Question

Marks-30

Long answer type questions (6*5=30)

1) (i) What is Genetics? How the variations are helpful for organisms?

(ii) Define-Allele

2) In pea plant, round seed is dominant over wrinkled. If a cross is carried between

these two plants, give answer to the following questions.

(a) Mention the genes for the traits of parents.

(b) State the trait of F1 hybrids.

(c) Write the ratio of F2 progeny obtained from this cross. What is the name of the

cross?

3) Can you justify the statement that “Human males are responsible for determining

the sex of the baby and not females”?

4) (i)What is vestigial organ, Give the importance of vestigial organs to know the

evolution?

(ii) Mention three important features of fossils which help in the study of evolution

5) (i) Why are traits acquired during the life-time of an individual not inherited?

(ii) With the help of suitable examples explain natural selection

6) The human beings who look so different from each other in terms of colour, size

and looks are said to belong to the same species. Why? Justify your answer​

Answer 1

Answer:

w4hehehwyytreehrhysj6y