Human Reproduction - Online Test
Q1. In which part of sperm, mitochondria are present?
Answer : Option B
Explaination / Solution:
Mitochondria are called power-house of the cell. Sperms need energy for active movement. Middle piece of sperm contain large number of mitochondria.
Q2. Sperms are of
Answer : Option B
Explaination / Solution:
Half of the sperm contain X-sex chromosome and remaining half contain Y-sex chromosome. Hence two kinds of sperms are formed by human male.
Q3. Corpus luteum secretes
Answer : Option D
Explaination / Solution:
The ovum released during ovulation undergoes several changes and change into corpus luteum that release two hormone, estrogen and progesterone.
Q4. Conversion of spematid into a spermatozoan is called
Answer : Option B
Explaination / Solution:
Each spermatid undergoes metamorphosis to develop into spermatozoa or sperms having head, neck and tail. Acrosome is present at the tip of head that contain enzyme for hydrolysis of wall of ovum during fertilisation.
Q5. The number of polar bodies formed during oogenesis in human being is
Answer : Option A
Explaination / Solution:
During oogenesis reduction division occurs in primary oocytes to produce one polar body and secondary oocytes. Polar bodies further divide to form two polar bodies. Secondary oocytes further divide to produce one polar bodies and a secondary follicle to produce ovum.
Q6. What is the number of sperms released in vagina in single insemination?
Answer : Option B
Explaination / Solution:
In single insemination during coitus about 200-300 millions of sperms are released in the vagina of female. About 60% of them must have normal shape and size along with vigorous motility for fertilisation of ovum.
Q7. Division of human egg is
Answer : Option C
Explaination / Solution:
Meroblastic is the type of incomplete cleavage that occurs in very yolky eggs, in which the egg cytoplasm but not the yolk divides.
Q8. The release of sperms from Sertoli cells into the cavity of seminiferous tubules is called as
Answer : Option C
Explaination / Solution:
Spermiation is the process of release of sperms from Sertoli cells into the cavity of seminiferous tubules.
Q9. Antrum is the cavity of
Answer : Option A
Explaination / Solution:
Ovary contains large number of Graafian follicle that maturates to produce ovum or egg. A small cavity is present in Graafian follicle called antrum.
Q10. In the human, sperm contain 22 pairs of autosomes and
Answer : Option A
Explaination / Solution:
An egg or sperm only has half of the parent's sex chromosome pair. An egg will always have an X chromosome, since the woman's sex chromosome pair only has Xs. Sperm can have either an X chromosome or a Y chromosome. If Y-chromosome containing sperm fertilize the ovum results is male.
