In humans, it is the mother’s chromosomes that determine the sex of the offspring.?

Question

true

false

Answer 1

False

The presence or absence of the Y chromosome determines sex.

The XY sex-determination system is a well-known sex-determination system. It is found in humans, most other mammals, some insects (Drosophila) and some plants (Ginkgo). In the XY sex-determination system, females have two of the same kind of sex chromosome (XX), and are called the homogametic sex. Males have two distinct sex chromosomes (XY), and are called the heterogametic sex.

Some species (including most mammals) have a gene or genes on the Y chromosome that determine maleness. In the case of humans, a single gene (SRY) on the Y chromosome acts as a signal to set the developmental pathway towards maleness.

Answer 2

There are two chromosomes, X and Y. Each gamete has one sex chromosome, so when sperm cell and ovum unite at fertilization, the zygote receives one of two possible combinations: XX or XY.
•Males are the heterogametic sex (XY). Half the sperm cells contain an X chromosome, while the other half contain a Y chromosome.

•Females are the homogametic sex (XX); all ova carry an X chromosome.

Whether an embryo develops into a male or female depends upon the presence of a Y

Answer 3

False - The mother's sex chromosome is always "x"
The father's sex chromosome can either be "y" or "x"

N.B. xx = female, xy = male

Answer 4

False.

The sex-determining chromosome comes from the dad.

Answer 5

False. Females are XX, males are XY. You always get an X from your mother. If you get a Y from your dad you are a boy, if you get an X from him you are a girl.

Answer 6

false