Maharashtra State Board
HSC 12th Biology MCQ
Chapter No. 3
Inheritance and Variation
1 |
The transmission of
genetic information from generation to generation is known as …………or ………... |
A |
Mechanism or inheritance |
B |
Gregor or Mendel |
C |
Responsible or expression
|
D |
Heredity or inheritance |
Ans: |
Heredity or inheritance |
2 |
Primary constriction
contests of a dislocate plate called |
A |
Constriction |
B |
Stranded |
C |
Kinetochore |
D |
Chromatid |
Ans: |
Kinetochore |
3 |
Chromatid consist a
double stranded molecule which extends from one end to other. |
A |
RNA |
B |
(X) |
C |
DAN |
D |
(Y) |
Ans: |
DAN |
4 |
The ends of chromosome
are known as |
A |
Acrocentric |
B |
Telocentric |
C |
Metacentric |
D |
Telomeres |
Ans: |
Telomeres |
5 |
The chromosomes which are
responsible for the determination of sex known as |
A |
X and Y |
B |
Chromosomes as sex |
C |
Sex chromosomes |
D |
Determination sex |
Ans: |
Sex chromosomes |
6 |
X chromosome has large
amount of and smell amount of………… |
A |
Euchromatin, genetically |
B |
Heterochromatin,
genetically |
C |
Euchromatin,
heterochromatin |
D |
Chromosome, homologous |
Ans: |
Euchromatin,
heterochromatin |
7 |
Such genes are called ……………... |
A |
Linkage |
B |
Linked genes |
C |
Heredity |
D |
Tendency |
Ans: |
Linkage genes |
8 |
This tendency of two or
more genes presents on the same chromosomes that are inherits in together is
known as |
A |
Linkage genes |
B |
Linkage |
C |
Weakly Linkage |
D |
Complete Linkage |
Ans: |
Linkage |
9 |
Garden pea has pairs of
chromosomes |
A |
7 Linkage groups |
B |
8 Linkage groups |
C |
6 Linkage groups |
D |
5 Linkage groups |
Ans: |
7 Linkage groups |
10 |
The transmission of
x-linked any y-linked genes offspring is called |
A |
Sex-linked |
B |
Sex-linked inheritance |
C |
X-linked |
D |
X y-linked |
Ans: |
Sex-linked inheritance |
11 |
It is exhibited by genes
located of x and y chromosomes |
A |
Y chromosomes |
B |
Non-homologous |
C |
X-and Y-chromosomes |
D |
All of these |
Ans: |
Non-homologous |
12 |
It is exhibited by genes
located of x and y chromosomes |
A |
Pimentos |
B |
Homologous regions |
C |
Chromosomes regions |
D |
Blindness |
Ans: |
Homologous regions |
13 |
………..experiments showing
linkage and Crossey over: |
A |
Dihybrid |
B |
Morgan’s |
C |
Progeny |
D |
Yellow-bodied |
Ans: |
Morgan’s |
14 |
They show very few
recombination’s |
A |
(1.3%) |
B |
(2.4%) |
C |
(1.4%) |
D |
(1.6%) |
Ans: |
(1.3%) |
15 |
Cross, it shows crossing
over between genes white………..and wing miniature………….. |
A |
(W) (N) |
B |
(W) (M) |
C |
(v) (M) |
D |
(S) (M) |
Ans: |
(W) (M) |
16 |
Transmission of body
other than sex linked parents they’re through is called |
A |
Autosomal inheritance |
B |
Autosomes control |
C |
Characters |
D |
Determination |
Ans: |
Autosomal inheritance |
17 |
A prominent shapes
hairline on is as widow’s peak. |
A |
“MM” |
B |
“W” |
C |
“V” |
D |
“M” |
Ans: |
“V” |
18 |
The linked genes are
located on non-homologous of chromosome and these all else on chromosome |
A |
X-X-Y |
B |
Y-X-Y |
C |
X-Y-X |
D |
X-Y-Y- |
Ans: |
X-X-Y |
19 |
Therefore, traits appear
more in males frequently than in the females |
A |
X-linked /sex-linked |
B |
Sex-linked /sex-linked |
C |
Y-linked /sex-linked |
D |
Sex-linked /y-linked |
Ans: |
Sex-linked /sex-linked |
20 |
Ovulation in the human
female normally takes place during the menstrual cycle |
A |
At the mind secretory
phase |
B |
Just before the end of
the secretory phase |
C |
At the beginning of the
proliferative phase |
D |
At the end of the
proliferative phase |
Ans: |
At the end of the
proliferative phase |
21 |
After ovulation graafian
follicle regresses into |
A |
Corpus atresia |
B |
Corpus callosum |
C |
Corpus luteum |
D |
Corpus albicans |
Ans: |
Corpus luteum |
22 |
Immediately after
ovulation the mammalian egg is covered by a membrane known as |
A |
Chorion |
B |
Zona pellucida |
C |
Corona radiata |
D |
vitelline membrane |
Ans: |
Corona radiata |
23 |
Which one of the
following events is correctly matched with the time period in a normal
menstrual cycle? |
A |
Release of egg stun day |
B |
Endometrium regenerates 5
10 days |
C |
Endometrium secretes
nutrients for |
D |
Rise in progesterone
level :1-15 days |
Ans: |
Endometrium regenerates 5
10 days |
24 |
If mammalian ovum fails
to get fertilized which one of the following is unlikely? |
A |
Corpus luteum will
disintegrate |
B |
Protester one secretion
increases |
C |
Estrogen secretion
incases. |
D |
Primary follicle starts
developing |
Ans: |
Estrogen secretion
increases. |
25 |
A reaction of granules
content which harden the zona pellocks and ensures sure block to polyspermy
is |
A |
Acrosomal reaction |
B |
Cortical reaction |
C |
Acrosin reaction |
D |
Bind in reaction |
Ans: |
Cortical reaction |
26 |
A human female reaches
menopause around the age of |
A |
50 years |
B |
15 years |
C |
70 years |
D |
25 years |
Ans: |
50 years |
27 |
Which part of the sperm
plays an Important role in penetrating the egg membrane? |
A |
All some |
B |
Tail |
C |
Autosome |
D |
Acrosome |
Ans: |
Acrosome |
28 |
In oocyte secondar
maturation occurs in |
A |
Ovary |
B |
Abdominal cavity |
C |
Fallopian tube |
D |
Uterus |
Ans: |
Fallopian tube |
29 |
Besides activating the
egg another role of a sperm is to carry to egg |
A |
RNA |
B |
Mitochondria |
C |
DNA |
D |
Ribosomes |
Ans: |
DNA |
30 |
Preparation of sperm
before penetration of ouvm is |
A |
Spermatoid |
B |
Cortical reaction |
C |
Shermer genesis |
D |
Coaptation |
Ans: |
Spermatoid |
31 |
Spermatoid is the process
of the release of sperms from |
A |
Seminiferous |
B |
Vas deferens |
C |
Epididymis |
D |
Prostate gland |
Ans: |
Seminiferous |
32 |
Mature graafian follicle
is generally present in the ovary of a healthy human female around |
A |
5-8 day of menstrual
cycle |
B |
11-17 day of menstrual
cycle |
C |
18-23 day of menstrual
cycle |
D |
24-28 day of menstrual
cycle |
Ans: |
11-17 day of menstrual
cycle |
33 |
Acrosomal reaction of the
sperm occurs sue to |
A |
Its contact with zona
pellucida of the ova the |
B |
Reactions within the
uterine averment to of female |
C |
And Rogens produced in
the uterus |
D |
Reactions within the
epididymal averment of the male |
Ans: |
Its contact with zona
pellucida of the ova the |
34 |
Which one of the
following is not a male accessory gland? |
A |
Accessory vesicle |
B |
Ampulla |
C |
Prostate |
D |
Bulbourethral gland |
Ans: |
Ampulla |
35 |
Which among the following
has 23 chromosomes? |
A |
Spermatogonia |
B |
Zygote |
C |
Secondary oocyte |
D |
Oogonia |
Ans: |
Secondary oocyte |
37 |
Which of the following hormones
is not secreted by human placenta? |
A |
HCG |
B |
Estrogens |
C |
Progesterone |
D |
LH |
Ans: |
LH |
38 |
The vas deferens receives
duct from the seminal vesicle and opens into urethra as |
A |
Epididymis |
B |
Ejaculatory ductuli |
C |
Efferent ductuli |
D |
Ureter |
Ans: |
Ejaculatory ductuli |
39 |
Urethral meatus refers to
the |
A |
Urinogenital
ductular |
B |
Opening of vasa Ferens
into urethra |
C |
External opening of the
urinogenital duct |
D |
Muscles surrounding the
urinogenital duct |
Ans: |
External opening of the
urinogenital duct |
40 |
Morula is a developmental
stage |
A |
Between the zygote and
blastocyst |
B |
Between the blastocyst
and gastrula |
C |
After the implantation |
D |
Between implantation and
parturition |
Ans: |
Between the zygote and
blastocyst |
41 |
The membranous cover of
the ovum at ovulation is |
A |
Corona radiata |
B |
Zona radiata |
C |
Zona pellucida |
D |
Chorion |
Ans: |
Corona radiata |
42 |
Identify the odd one from
the following |
A |
Labia minora |
B |
Fimbriae |
C |
Infundibulum |
D |
Isthmuses |
Ans: |
Labia minora |
43 |
The nutritive cells found
in seminiferous tubules are |
A |
Leydig cells |
B |
Atretic follicular cells |
C |
Sertoli cells |
D |
Chromaffin cells |
Ans: |
Leydig cells |
44 |
Teem prelature of the
scrotum which is necessary for the functioning of testis is always |
A |
2o |
B |
4o |
C |
6o |
D |
8o |
Ans: |
2o |
45 |
Sertoli sells are
regulates by the pituitary hormone known as |
A |
LH |
B |
FSH |
C |
GH |
D |
Prolactin |
Ans: |
FGH |
46 |
The head of the
epididymis at the head of the testis it called |
A |
Cauda epididymis |
B |
Vas deferens |
C |
Caput epididymis |
D |
Gubernaculum |
Ans: |
Caput epididymis |
47 |
Prostate gland is located
below |
A |
Gubernaculum |
B |
seminal vesicles |
C |
Epididymis |
D |
Bulbourethral glans |
Ans: |
seminal vesicles |
48 |
The function of the
secretion of prostate gland is to |
A |
Inhibit sperm an activity
|
B |
Attract sperms |
C |
Stimulate sperm activity |
D |
None of these |
Ans: |
Stimulate sperm activity |
49 |
In human adult female’s
oxytocin |
A |
Stimulates pituitary to
secrete vasopressin |
B |
Causes strong uterine
contractions during parturition |
C |
Is secreted uterine by
pituitary |
D |
Stimulates growth of a
mammary glans |
Ans: |
Causes strong uterine
contractions during parturition |
50 |
After birth, colostrum is
released from mammary glands which is rich in |
A |
Fat and low in proteins |
B |
Proteins and low in fat |
C |
Proteins antibodies and
low in fat |
D |
Proteins, fat and low in
anil bodies |
Ans: |
Proteins antibodies and
low in fat |
51 |
Spot the odd one out from
the following structures with reference to the male reproductive system. |
A |
Rate testis |
B |
Epididymis |
C |
Vasa efferent |
D |
Isthmus |
Ans: |
Isthmus |
52 |
Seminal plasma, the fluid
part of semen, is contributed by |
A |
Seminal vesicle |
B |
Prostate |
C |
Urethra |
D |
Bulbourethral gland |
Ans: |
Bulbourethral gland |
53 |
How many sperms are forms
from a secondary sperm at oocyte? |
A |
4 |
B |
8 |
C |
2 |
D |
1 |
Ans: |
2 |
54 |
In humans, at the end of
the first meiotic division, the male germ cells differentiate in to the |
A |
Spermatids |
B |
Primary spermatocytes |
C |
Spermatogonia |
D |
Secondary spermatocytes |
Ans: |
Secondary spermatocytes |
55 |
How many sperms are forms
from 4 primary spermatocytes? |
A |
4 |
B |
16 |
C |
1 |
D |
32 |
Ans: |
16 |
56 |
Which of the following
groups of cells in the male gonad, represent haploid cells |
A |
Spermatogonia calls |
B |
Germinal epithelial cells
|
C |
Secondary spermatocytes |
D |
Primary spermatocytes |
Ans: |
Secondary spermatocytes |
57 |
The process of release of
spermatozoa from Sertoli cells into cavity of the seminiferous |
A |
spermiogenesis |
B |
Spermatogenesis |
C |
Spermatocytogenesis |
D |
Spermatoid |
Ans: |
Spermatoid |
58 |
The principal tail piece
of human sperm shows the microtubular arrangement of |
A |
7+2 |
B |
9+2 |
C |
11+2 |
D |
13+2 |
Ans: |
11+2 |
59 |
Acrosome id a type of |
A |
Lysosome |
B |
Flagellum |
C |
Ribosome |
D |
Basal body |
Ans: |
Lysosome |
60 |
Which of the following contains
the actual genetic part of a sperm? |
A |
Whole of it |
B |
Tail |
C |
Middle piece |
D |
Head |
Ans: |
Head |
61 |
The sperms undergo
physiological maturation acquiring increased motility and fertilizing
capacity in |
A |
Sem iniferoustubules |
B |
Vasa efferent a |
C |
Epididymis |
D |
Vagina |
Ans: |
Epididymis |
62 |
At what stage of life is
oogenesis initiated in a human femle? |
A |
At puberty |
B |
During menopause |
C |
During menarche |
D |
During embryonic
development |
Ans: |
During embryonic development |
63 |
Its polar body is formed
at which stage of |
A |
1st meiosis |
B |
2nd mitosis |
C |
1st mitosis |
D |
Differentiation |
Ans: |
1st meiosis |
64 |
Which one is released
from the ovary? |
A |
Primary oocyte |
B |
Secondary oocyte |
C |
Graafian follicle |
D |
Oogonium |
Ans: |
Secondary oocyte |
65 |
In oogenesis haploid egg
is fertilized by sperm at which stage? |
A |
Primary oocyte |
B |
Secondary oocyte |
C |
Oogonium |
D |
Ovum |
Ans: |
Secondary oocyte |
66 |
During oogenesis, each
diploid cell produces |
A |
Four functional eggs |
B |
Two functional eggs and
two polar bodies |
C |
One functional egg and
three polar bodies |
D |
Four functional polar
bodies |
Ans: |
One functional egg and
three polar bodies |
67 |
Which part of ovary in
mammals acts as an endocrine gland after ovulation? |
A |
Stroma |
B |
Germinal epithelium |
C |
Vitelline membrane |
D |
Graafian follicle |
Ans: |
Graafian follicle |
68 |
The sex of the fetus will
be decided at |
A |
Fertilization by male
gamete |
B |
Implantation |
C |
Fertilization by female
gamete |
D |
The start of cleavage |
Ans: |
Fertilization by male
gamete |
69 |
Cleavage differs from
mitosis in lacking |
A |
Synthetic phase |
B |
Growth phase |
C |
Both (a) and (b) |
D |
None of these |
Ans: |
Growth phase |
70 |
What id true about
cleavage in the fertilized egg in humans |
A |
It starts while egg is in
fallopian tubes |
B |
It starts when the egg
reaches uterus |
C |
It is meroblastic |
D |
It is identical to the
normal mitosis |
Ans: |
It starts while egg is in
fallopian tubes |
71 |
Cleavage differs from
mitosis in lacking |
A |
Synthetic phase |
B |
Growth phase |
C |
Both (A) and (B) |
D |
None of these |
Ans: |
Growth phase |
72 |
The solid mass of 8-16
cells formed from zygote after successive mitotic divisions is called |
A |
Blastula |
B |
Gastrula |
C |
Morula |
D |
None of these |
Ans: |
Morula |
73 |
Implantation takes place
after………. of fertilization |
A |
5 days |
B |
6 days |
C |
7 days |
D |
8 days |
Ans: |
7 days |
74 |
Structure connecting the
fetus to placenta is |
A |
Umbilical cord |
B |
Amnion |
C |
Yolk sac |
D |
Chorion |
Ans: |
Umbilical cord |
75 |
Which of the following
hormones is not a secretory product of Huan placenta? |
A |
Human chorionic |
B |
Prolactin |
C |
Estrogen |
D |
Progesterone |
Ans: |
Prolactin |
76 |
Urine test during
pregnancy determines the presence of |
A |
Human chorionic
gonadotropin hormone |
B |
Estrogen |
C |
Progesterone |
D |
Cutinizing hormone |
Ans: |
Human chorionic
gonadotropin hormone |
77 |
In the event of
pregnancy, the corpus cutout persists under influence of |
A |
LH |
B |
FSH |
C |
chorionic gonadotropin |
D |
Progesterone |
Ans: |
chorionic gonadotropin |
78 |
During the development of
embryo which of the following occurs first? |
A |
Differentiation of
organ |
B |
Differentiation of tissue
|
C |
Differentiation of organ
system |
D |
Differentiation of cell |
Ans: |
Differentiation of cell |
79 |
The structures derived
from ectoderm are |
A |
Pituitary gland |
B |
Cornea |
C |
kidney’s |
D |
Notochord |
Ans: |
kidney’s |
80 |
Gastrula is the embryonic
stage in which |
A |
Cleavage occurs |
B |
Blastocoel form |
C |
Germinal layers form |
D |
Villi form |
Ans: |
Germinal layers form |
81 |
In the development of the
human body, the ectoderm is responsible for the formation of |
A |
Lens of the eye |
B |
Nervous system |
C |
Sweat gland |
D |
All of these |
Ans: |
All of these |
82 |
The first movement of the
fetus and appearance of hair on its head are usually observes during which
month od pregnable? |
A |
Forth month |
B |
Fifth month |
C |
Sixth month |
D |
Third month |
Ans: |
Fifth month |
83 |
The early-stage human
embryo distinctly possesses |
A |
Gills |
B |
Gill slits |
C |
External |
D |
Eyebrows |
Ans: |
Gill slits |
84 |
Delivery of developed
fetus is scientifically called |
A |
Parturition |
B |
Oviposition |
C |
Abortion |
D |
Ovulation |
Ans: |
Parturition |
85 |
The Leydig cells are a
source of |
A |
Fructose |
B |
Androgens |
C |
Progesterone |
D |
Mucus |
Ans: |
Androgens |
86 |
The function of corpus
catena is to produce |
A |
Estrogen |
B |
Progesterone |
C |
HCG |
D |
Relax in |
Ans: |
Progesterone |
87 |
Which hormone of
pituitary gland regulates Sertoli cells? |
A |
LH |
B |
FGH |
C |
GH |
D |
Prolactin |
Ans: |
FGH |
88 |
Spot the odd one out from
he following structures with reference to the male reproductive system. |
A |
Rete testis |
B |
Epididymis |
C |
Vasaefferentia |
D |
Isthmus |
Ans: |
Isthmus |
89 |
Number of chromosomes in
pear body of human id |
A |
23 |
B |
46 |
C |
21 |
D |
1 |
Ans: |
23 |
90 |
Chromosomal theory of in
heritance was proposed …………. |
A |
Sutton and Bouie |
B |
Watson and circle |
C |
Miller and very |
D |
Oparin and Halden |
Ans: |
Sutton and Bouie |
91 |
The term ………. speaks for
the degree of repetition of the primary cell |
A |
Ploidy |
B |
Euploidy |
C |
Aneuploidy |
D |
Chemically |
Ans: |
Ploidy |
92 |
When the chromosome
number is not the exact multiple of haploid as |
A |
Aneuploidy |
B |
Microscope |
C |
Metaphase |
D |
Euploid |
Ans: |
Aneuploidy |
93 |
The transmission of
parent’s genes is called |
A |
y-linked |
B |
Sex-linked |
C |
Sex-linked inheritance |
D |
XY-lined |
Ans: |
Sex-linked inheritance |
94 |
Hence, this law is also
described as |
A |
Law of purity of gametes |
B |
Law of independent
assortment |
C |
Law of dominance |
D |
Law of segregation |
Ans: |
Law of purity of gametes |
95 |
Such a cross is known as |
A |
Back cross |
B |
Test cross |
C |
Repeatable |
D |
Predictable |
Ans: |
Back cross |
96 |
These deviations are then
described as |
A |
Neo-mentalism |
B |
single- gene |
C |
Admittance- mentalism |
D |
Post -mentalism |
Ans: |
Admittance -mentalism |
97 |
Example of multiple
alleles is blood grouping in human beings? |
A |
A, O,13 |
B |
A, B, O |
C |
A, B, D |
D |
A, C, B |
Ans: |
A, B, O |
98 |
Out of these 22 pairs are……….
and one pair of…………….. |
A |
Homomorphic-sex
chromosomes |
B |
Autosomes-sex chromosomes |
C |
Heteromorphic- sex
chromosomes |
D |
Nucleus- sex chromosomes |
Ans: |
Autosomes-sex chromosomes |
99 |
The mechanism by which
sex is termed as |
A |
Hermaphrodite |
B |
Monoecious |
C |
Sex determination |
D |
Bisexual |
Ans: |
Sex determination |
100 |
In birds, the chromosomal
mechanism of sex determination type |
A |
zz-zz |
B |
Zy-zz |
C |
Zw-zz |
D |
zz-zy |
Ans: |
Zw-zz |
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