Sex determination

Q. How many types of sex chromosomes do humans have?

1. 3 (X, Y and Z)
2. 1 (only X)
3. 2 (X and Y)
4. 1 (only Y)

Q.

A boy child is born when it inherits …………..chromosome from father and ………….. chromosome from mother.

1. X ; Y

2. X ; X

3. Y ; X

4. Y ; Y

Q.

Which of the combinations of sex chromosomes produces a male child, XX or XY?

Q.

The number of pairs of autosomes in a human cell is __.

Q.

The human cell consist of ................... pairs of homologous and non-homologous chromosomes respectively.

1. 46 +23

2. 22+01

3. 22+46

4. 22 +23

Q.

Explain mechanisms of sex determination in human being. [5 MARKS]

Q.

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

Q. A girl child is born when she inherits ______ chromosome from father and ________ chromosome from mother.

1. Y ; Y
2. X ; Y
3. X ; X
4. Y ; X

Q. Human baby will be a male if its 23rd chromosome pair is ____.

1. XX
2. XY
3. X
4. XXX

Q. In India, many people believe that the woman is responsible for the sex determination of the child. Which of the following facts dismissed this notion?

1. Sex determination in humans depends upon the environment
2. The chances of getting a male child is higher if the female is healthy
3. The Y chromosome is found only in males and hence a woman cannot control the sex of a child
4. The chance of getting a female child is higher if the male is healthy

Q. ______ are homologous chromosomes which are similar in both the sexes.

1. Androsomes
2. Allosomes
3. Autosomes
4. Chromosomes