In humans, if gene B gives brown eyes and gene b gives blue eyes, what will be the colour of the eyes of the person having combination (i) Bb (ii) BB:

What is the probability that the male progeny will be a boy?

Which of the following does Darwin’s theory not include?

In pea plants, yellow seeds are dominant to green seeds. If a heterozygous yellow-seeded plant is crossed with a green-seeded plant, what ratio of yellow and green-seeded plants would you expect in the F1 generation?

Which of the following statements is not true with respect to variation?

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

Exchange of genetic material takes place in:

Fruits are formed from the

Reproduction is essential for living organisms in order to ……………………

The male reproductive parts of a flower, the stamens, are collectively known as

Which of the following diseases is transmitted sexually?

IUCD is for

Which of the following is a contraceptive?

The correct sequence of organs in the male reproductive system for the transport of sperm is

Which among the following is not the function of the testes at puberty?
(i) Formation of germ cells
(ii) Secretion of testosterone (iii) Development of placenta (iv) Secretion of estrogen

During adolescence, several changes occur in the human body. Mark one change from the following associated with sexual maturation in boys