Q9 of 47 Page 73

Select the incorrect statement

Reduction in weight of the organism due to starvation is external environmentally determined factor. It is not genetically controlled because it will not change the DNA of germ cells. Hence, option ‘b’ shows incorrect statement.

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7

The maleness of a child is determined by

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A zygote which has an X-chromosome inherited from the father will develop into a

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New species may be formed if

i. DNA undergoes significant changes in germ cells


ii. chromosome number changes in the gamete


iii. there is no change in the genetic material


iv. mating does not take place

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Two pea plants one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce F1 progeny that have round, yellow (RrYy) seeds. When F1 plants are selfed, the F2 progeny will have new combination of characters. Choose the new combination from the following

i. Round, yellow


ii. Round, green


iii. Wrinkled, yellow


iv. Wrinkled, green