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4

Correct sequence in embryonic development is ..

A. Fertilization -> zygote -> cleavage -> morula -> blastula -> gastrula

B. Fertilization -> zygote -> cleavage -> blastula -> morula -> gastrula

C. Fertilization -> zygote -> cleavage -> morula -> blastula -> gastrula

D. Fertilization -> zygote -> gastrulae -> morula -> blastula -> cleavage

Correct Answer :

A. Fertilization -> zygote -> cleavage -> morula -> blastula -> gastrula


Related Questions

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The rate of active movement of sperm is ...

A. 1.5 -3.0 mm/min

B. 1.5 - 3.0 cm/min

C. 1.5 -3.0 m/min

D. 1.5 -3.0 m/hr

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4

Acrosome of sperm contains ...

A. Hyaluronidase and acrosin

B. Hyaluronic acid and acrosin

C. Hippuric acid and uric acid

D. Testosterone

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4

The first milk which comes out just after child birth is known as .

A. Colostrum

B. Prolactin

C. Hind milk

D. Lactogen

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Cryptorchidism is ...

A. Nondescent of testes in scrotum

B. Nondevelopment of testes

C. Removal of scrotum

D. Breaking connection of vas deferens

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Embryo at 16-celled stage is called ...

A. Morula

B. Blastula

C. Blastomere

D. Gastrula

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A genetically diseased father (male) marries with a normal female and gives birth to 3 carrier girls and 5 normal sons. Find out the type of genetic disease.

A. Sex-influenced disease

B. Blood group inheritance disease

C. Sex-linked disease

D. Sex-recessive disease

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4

Immediately after ovulation, the ovum is covered by a membrane called

A. Chorion

B. Zona pellucida

C. Corona radiata

D. Vitelline membrane

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4

Secretion of testosterone is stimulated by

A. FSH

B. TSH

C. ICSH

D. ACTH

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4

Cri-du-chat syndrome in humans is caused by the

A. Trisomy of 21st chromosome

B. Fertilization of an xx egg by a normal y-bearing sperm

C. Loss of half of the short arm of chromosome 5

D. Loss of half of the long arm of chromosome 5

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4

In which phase of menstrual cycle ovulation occurs in

A. Luteal

B. Menstrual

C. Proliferative

D. Secretory

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4

Which of the following is not a hereditary disease?

A. Cystic fibrosis

B. Thalassaemia

C. Haemophilia

D. Cretinism

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Corpus luteum secretes

A. Lh

B. Estrogen

C. Progesterone

D. Fsh

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Which one of the following is produced early in the life of a human female?

A. Relaxin

B. Oxytocin

C. Prolactin

D. Progesterone

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4

What is the best sperm extraction technique for men with obstructive azoospermia?

A. TESE - Microsurgical testicular sperm extraction

B. Percutaneous Epididymal Sperm Aspiration (PESA)

C. Intra cytoplasmic sperm injection ( ICSI)

D. Fine needle aspiration

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4

Embryonic connective tissue is formed from ..

A. ectoderm

B. endoderm

C. Mesenchyme

D. Mesogloea

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Part of fallopian tube closest to ovary is

A. Infundibulum

B. Cervix

C. Ampulla

D. Isthmus

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Which part of the foetus is developed from mesoderm?

A. Heart and notochord

B. Heart and brain

C. Spinal cord and notochord

D. Brain and notochord

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Corona radiata is held by...

A. Mucopolysaccharide

B. Oligosaccharide

C. Lipopolysaccharide

D. Lipoprotein

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4

Approximately how long does it take for a spermatocyte to complete its differentiation into a spermatozoan in the testis?

A. 7 days

B. 70 days

C. 7 months

D. 70 hours

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What happens during fertilization when many sperms reach close to ovum ....

A. Cells of corona radiata trap all the sperm except one

B. Only two sperms nearest to ovum penetrate zona pellucida

C. Secretion of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida

D. All sperms except the one nearest to ovum lose their tails

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Which cells provide nutrition to the sperms?

A. Sertoli cells

B. Leydig cells

C. Crypt cells

D. Semniferous tubules

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Part of sperm that passes into ovum is

A. Tail

B. Acrosome

C. Head

D. Head, neck and middle piece

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Highly sophisticated procedure of injecting sperm directly into the ovum is

A. GIFT

B. ZIFT

C. ICSI

D. IUI

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Name the pituitary hormone that regulates sertoli cells

A. Prolactin

B. LH

C. FSH

D. Oxytocin

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4

Albinism is a congenital disorder resulting from the lack of which enzyme?

A. Tyrosinase

B. Xanthine oxidase

C. Catalase

D. Fructokinase.

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Third phase of embryo development is ...

A. Cleavage

B. Fertilization

C. Gametogenesis

D. Gastrulation

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Haemophilia is more common in males because it is a

A. Recessive character carried by y-chromosome

B. Dominant character carried by y-chromosome

C. Dominant trait carried by x-chromosome

D. Recessive trait carried by x-chromosome

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Which one occurs first in the human embryo

A. Neurogenesis

B. Cardiogenesis

C. Hepatogenesis

D. Osteogesis

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In a semen analysis, the following is not acceptable as normal�

A. 25 % abnormal forms

B. 60% motility after 3 hours

C. Mild Alkaline reaction

D. Sperm count of 17 million per ml.

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4

When there is no fertilization, the corpus luteum ...

A. Stops secreting progesterone

B. Changes to corpus albicans

C. Starts producing progesterone

D. Begins next cycle