Determination of sex of a child depends upon

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4.Principles of Inheritance and Variation

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Determination of sex of a child depends upon

Nature of sperm

Nature of egg

Health of father

Age of mother

Solution

(a)Sex chromosomes are $X$ and $Y$ and in a child on $X$ has to come from the egg $(XX)$, so it is the nature of sperm $(XY)$ which will determine the sex of the child.

Standard 12

Biology

While solving the problem of sex determination in large number of insects, it was observed that

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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.

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(AIIMS-2005)

Bird females have chromosome arrangement as

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(AIIMS-2009)

$A$ : $XO$ type sex determination is found in large number of insects.
$R$ : Some of the sperms bear the $X-$chromosome whereas some do not

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Which one of the following conditions correctly describes the manner of determining the sex?

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(AIIMS-2018)

Determination of sex of a child depends upon

Solution

Similar Questions

While solving the problem of sex determination in large number of insects, it was observed that

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.

Bird females have chromosome arrangement as

$A$ : $XO$ type sex determination is found in large number of insects. $R$ : Some of the sperms bear the $X-$chromosome whereas some do not

Which one of the following conditions correctly describes the manner of determining the sex?

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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.

$A$ : $XO$ type sex determination is found in large number of insects.
$R$ : Some of the sperms bear the $X-$chromosome whereas some do not