Q44 of 167 Page 193

A normal cell of human body contains 23 pairs of chromosomes. The number of chromosomes in a sex cell

(Sperm or ovum) of a human being is most likely to be:

23

Somatic cells have 46 chromosomes (23 pairs of chromosome) i.e., they are diploid. The chromosome number is haploid in sex cells so they have 23 chromosomes.

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42

The science of heredity is known as:

 43

A gene is a:

 45

In order to ensure that he had pure-breeding plants for his experiments, Mendel:

 46

In the human blood grouping, the four basic blood types are type A, type B, type AB, and type 0. The blood proteins A and B are: