Sex determination in humans takes place by:

Sex chromosomes of father

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Measurement of sperm quantity

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Measurement of ovum

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Sex chromosomes of mother

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Solution

The correct option is A Sex chromosomes of father
Human females (XX) carry two copies of X chromosomes as sex chromosomes and hence, transmit only X chromosomes to both male and female offspring. But, a human male (XY) has one X and one Y chromosome as sex chromosomes. If the father transmits X chromosome to the child, sex of the child will be female (XX). While, if the child gets the Y chromosome from the father, it will be a male child (XY). Hence, the type of sex chromosome of father determines the sex of in humans.
Thus, the correct answer is option A.

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Similar questions

Which type of sex chromosomes are carried by male gametes-sperms in human male?

	List I		List II
A	In human beings and a number of other animals, there are two types of chromosomes, ______, and allosomes.	1	44+XY
B	_______ are those chromosomes which control functions of the body, other than sex determination. Allosomes or sex chromosomes are the chromosomes that determine the sex of the individual in unisex organisms.	2	Autosomes
C	Human beings have _____ pairs of chromosomes.	3	23
D	_____ determine the sex of the individual.	4	Sex chromosomes
E	The two sex chromosomes of females are similar and are called _____ chromosomes. They are dissimilar in human males. One is a normal-sized X-chromosome. The other is smaller with a good amount of non-function chromatin. It is called the Y-chromosome.	5	XX
F	The chromosome complement of human females is ______	6	44+XX
G	Human males is _____. Human females are homogametic, i.e., produce only one type of gametes or ova (22 + X). Humans are heterogametic, i.e., they produce two types of gametes sperms, angiosperms, and gymnosperms.	7	Autosomes

Humans have 46 chromosomes. How many chromosomes will their sperm and egg have?

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