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Fertilisation in Humans

Traits found ...

Question

Traits found in males are due to the presence of __ chromosome.

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Solution

The Y chromosome in human males have a very distinctive property. Apart from distinguishing the males from the females, they also carry genes for certain traits like facial hair etc, which are found only in males.

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Certain traits are found only in males since they are present on the Y chromosome.

Q. What are sex chromosomes? Which sex chromosomes are found in male and female human beings? State the chromosomes responsible for the development of the male child in human beings.
(b) Explain whether the traits like eye colour or height is genetically inherited or not. Do power to lift weight and reading french also belong to the same category? Justify your answer.

Q. A single recessive trait, able to express must be on
(a) Y chromosome
(b) X chromosome in male
(c) X chromosome in female
(d) autosome

Q. Name of the following:
Appearance of a trait due to the presence of an allele exclusively on either the X chromosome or on the Y chromosome.

Q. Assertion [A]: Patients suffering from Klinefelter's syndrome have high amounts of estrogen secreted in their body.

Reason [R]: Klinefelter's syndrome occurs due to the presence of an extra X chromosome in human males.

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