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Human Reproduction

Long Answer Type

131.

(a) Arrange the following hormones in the sequence of their secretion in a pregnant woman.
(b) Mention their source and the function they perform.

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Short Answer Type

132.

Give an account of the follicular phase of the menstrual cycle.

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133.

Explain the process of spermatogenesis.

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134.

Define Implantation.

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135.

Define Capacitation.

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136.

Medically it is advised to all young mothers that breastfeedings is the best for their newborn babies. Do you agree? Give reasons in support of your answer.

137.

Draw a diagram of a mature human sperm. Label any three parts and write their functions.

138.
Expand VNTR and describe its role in DNA fingerprinting.

VNTR stands for “Variable Number of Tandem Repeats”.
The VNTR belongs to a class of satellite DNA referred to as mini-satellite. A small DNA sequence is arranged tandemly in many copy numbers. The copy number varies from chromosome to chromosome in an individual. The numbers of repeat show very high degree of polymorphism. As a result th size of VNTR varies in size from 0.1 to 20 kb. Consequently, after hybridization with VNTR probe, the autoradiogram gives many bands of differing sizes. These bands give characteristic pattern for an individual DNA which is used to identify individuals.