Q57 of 167 Page 193

The two versions of a trait (character) which are brought in by the male and female gametes are situated on:

Copies of the same chromosome

These versions of traits are known as genes which when brought in by the male and female gametes are found on copies of same chromosome so that they do not assort independently and are said to be linked.

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55

The number of pair(s) of sex chromosomes in the zygote of humans is:

 56

In peas, a pure tall plant (IT) is crossed with a pure short plant (tt). The ratio of pure tall plants to pure short plants in F2 generation will be:

 58

Select the statements that describe characteristics of genes:

(i) genes are specific sequence of bases in a DNA molecule


(ii) a gene does not code for proteins


(iii) in individuals of a given species, a specific gene is located on a particular chromosome


(iv) each chromosome has only one gene

 59

Select the group which shares the maximum number of common characters: