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Sexual Reproduction

Question 48Wh...

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Question 48
What would be the ratio of chromosome number between an egg and its zygote? How is the sperm genetically different from the egg??

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Solution

The ratio is 1:2 of chromosome number between an egg and its zygote. Sperms contain either X or Y chromosome whereas an egg will always have an X chromosome.

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Question 48
What would be the ratio of chromosome number between an egg and its zygote? How is the sperm genetically different from the egg??

Q. What would be the ratio of chromosome number between an egg and its zygote?

Q. When a sperm containing Y chromosome fertilizes an egg with X chromosome, the zygote develops into a .......... child.

Q. Given are diagrams showing the different stages in the process of fertilisation of an egg in human female reproductive tract.
Study the diagrams and answer the question.
Mention the chromosome number of the egg and zygote in humans.

The sperm and the egg make different contributions to zygote. Which of the following statements about their contributions are true?

(i) Sperm contributes most of the mitochondria.

(ii) Egg contributes most of the cytoplasm.

(iii) Both sperm and egg contribute haploid nucleus

(iv) Both sperm and egg contribute centrioles.

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Sexual Reproduction

Standard X Biology

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