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Inheritance and Variation hsc biology MCQ

Khatib Afsar 5:12 PM

 

Maharashtra State Board
HSC 12th Biology MCQ
Chapter No. 3
Inheritance and Variation

 

Inheritance and Variation hsc biology MCQ

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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