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Chromosomes

In reptiles l...

Question

In reptiles like alligators, some turtles,tuatara, sex is determined by _________

A

X-chromosome

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B

Y-chromosome

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C

Temperature

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D

Z chromosome

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Solution

The correct option is C
Temperature

In reptiles like alligators, some turtles,tuatara, sex is determined by the temperature at which the egg is incubated during a temperature-sensitive period.

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Q. Assertion :In humans, the gamete contributed by the male determines whether the child produced will be male or female. Reason: Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on X-chromosome and some on Y - chromosome.

Q. Question 7
The maleness of a child is determined by

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(a) the presence of an X chromosome in egg (or ovum).

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(d) the length of the mother's pregnancy.

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