The sex of a child is determined by which of the following?
(a) the length of the mother's pregnancy
(b) the length of time between ovulation and copulation
(c) the presence of and X chromosome in an ovum
(d) the presence of a Y chromosome in a sperm

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Solution

(d) the presence of a Y chromosome in a sperm
The sex of a child is determined by the Y chromosome that is present in a sperm.

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Q. The sex of a newborn child is genetically determined, Sex in human beings is determined by the presence or absence of a Y chromosome. An embryo with XX chromosomes develops into a female and an embryo with XY chromosomes develops into a male. One X chromosome is always contributed by the female parent or the mother and the sex of the embryo depends on the chromosome received in the sperm or from the male parent. Type 1 for true and 0 for flase

What will be the sex of the child born :

(a) if X chromosome carrying sperm fertilizes an ovum containing X chromosome?

(b) if Y chromosome carrying sperm fertilizes an ovum containing X chromosome?

Question 7
The maleness of a child is determined by

(a) the X chromosome in the zygote
(b) the Y chromosome in the zygote
(c) the cytoplasm of the germ cell which determines the sex
(d) sex is determined by chance

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 :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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The sex of a child is determined by which of the following? (a) the length of the mother's pregnancy (b) the length of time between ovulation and copulation (c) the presence of and X chromosome in an ovum (d) the presence of a Y chromosome in a sperm

(d) the presence of a Y chromosome in a sperm The sex of a child is determined by the Y chromosome that is present in a sperm.

The sex of a child is determined by which of the following?
(a) the length of the mother's pregnancy
(b) the length of time between ovulation and copulation
(c) the presence of and X chromosome in an ovum
(d) the presence of a Y chromosome in a sperm

(d) the presence of a Y chromosome in a sperm
The sex of a child is determined by the Y chromosome that is present in a sperm.