Q22 of 41 Page 190

Draw a checker board to show the law of independent assortment with a flow chart and explain the ratio. (AS5)

When a pea plant with yellow and round seeds (pure), were crossed with those having green and wrinkled seeds (pure). The F1 seeds were obtained yellow and round. When these F1 seeds were grown in plants, F2 seeds were obtained which showed all the four possible combinations i.e., yellow and round, yellow and wrinkled, green and round, green and wrinkled. These four kinds of seeds were obtained in the ratio of 9:3:3:1.


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20

With the help of given information write your comment on evidence of evolution. (AS4)

Mammals have four limbs as do birds, reptiles, and amphibians. The basic structure of the limbs is similar, though it has been modified to perform different functions.

 21

Collect information about carbon dating method. Discuss with your physical science teacher. (AS4)

 23

Explain the process to understand monohybrid cross of Mendel experiment with a checker board.(As5)

 24

Prepare a chart showing evolution of man through ages. (AS6)