Sex Determination

Which of the following organisms show heterogametic nature in one of their sex?

Which of the following is an example of ZW-ZZ type of mechanism of sex determination?

The chromosomes responsible for the determination of sex in humans are ______.

Barr body is found in humans. It is associated with _____.

The chromosomes in human males and females are represented as _____ and _____.

Match the following

When sex determination occurs after fertilization, it is called __________.

Human genetics at metaphase may be karyotyped.

Discuss the genic balance mechanism of sex determination with reference to Drosophila.

Differentiate Intersexes from Supersexes.

Sex-determination in human being is _____.

Rashmi gave birth to three girls. Her mother-in-law blamed her for giving birth to girls. However, as we know, ova (eggs) are only of one type containing 22+X chromosomes but sperms are of two types: one type of sperms contain 22+X chromosomes and another type of sperms contain 22+Y chromosomes. When ovum and sperm with 22+Y chromosomes are fused, male child is formed and when ovum and sperm with 22+X chromosomes are fused, girl child is produced.

Read the above passage and answer the following questions:

Penetration of which type of sperm into ovum produces male child. (X or Y)

Observe the given figure carefully.


Which among the following shows this type of sex determination?

In grasshopper (A) and birds (B), the mechanism of sex determination is?

Barr body can be visualised in the cytoplasm during

Select the incorrect pair.

Find out the correct statement.

Select the incorrect match from the options given below.

Select the correct statement.

In man, the usual number of chromosomes is: