JAMB Biology Past Questions & Answers - Page 242

1,206.

The umbrella shaped fruiting body of a fully developed mushroom is the

A.

Pileus

B.

Mycelium

C.

Basidium

D.

Stipe

Correct answer is A

No explanation has been provided for this answer.

1,207.

One distinctive feature in the life history of liverworts is that they exhibit

A.

Alternation of generation

B.

Vegetative reproduction

C.

Asexual reproduction

D.

Sexual reproduction

Correct answer is A

No explanation has been provided for this answer.

1,208.
1,209.

The first four children of a couple were all girls. The probability that the fifth will also be a girl is

A.

1/5

B.

1/4

C.

1/3

D.

1/2

Correct answer is D

No explanation has been provided for this answer.

1,210.

If XN is the dominant allele for normal vision and Xn the recessive allele for colour blindness, a boy with the genotype YXn will be

A.

have normal vision

B.

be colour-blind

C.

be totally blind

D.

be a carrier of colour blindness

Correct answer is D

The boy is a carrier because Xn is the recessive allele for colour blindness.