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Hormonal Regulation of the Menstrual Cycle

List two reas...

Question

List two reasons for the appearance of variations among the progeny formed by sexual reproduction.

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Solution

1) Meiosis: Crossing over during pachytene of prophase I of meiosis produces new genetic combinations.
2) Fertilization: random fertilization of male and female gamete aids more genetic variations.

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Q. Which one among the following reason for the appearance of variations among the progeny formed by sexual reproduction?

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Give two reasons for the appearance of variations among the progeny formed by sexual reproduction.

Q. Give two reasons for the appearance of variation among the progenies formed by sexual reproduction.

Q. (a) List two reasons for the appearance of variations among the progeny formed by sexual reproduction.

(b)

(i) Name the part marked 'A' in the diagram.

(ii) How does 'A' reaches part 'B' ?

(iii)State the importance of the part 'C'.

(iv) What happens to the part marked 'D' after fertilisation is over?

Q. Write two points of difference between asexual and sexual types of reproduction. Describe why variations are observed in the offspring formed by sexual reproduction?

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Hormonal Regulation of the Menstrual Cycle

Standard XII Biology

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