Biology Questions and Answers

How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.

3,006.

If a cross is made between a pure-breeding red flowered plant and a pure-breeding white flowered plant
where R is dominant for red flower and r is recessive for white, the most likely result of F generation will be

75% red flowers and 25% white flowers

all red flowers

75% white flowers and 25% red flowers

50% red flowers and 50% white flowers

all white flowers

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

3,007.

The haploid number of chromosomes in man is

View answer & explanation

Correct answer is E

No explanation has been provided for this answer.

3,008.

The homozygous condition Hb^sHb^sresults in sickle cell anaemia whereas Hb^AHb^s has the sickling trait. What is the probability that a couple with the sickling trait will give birth to one normal child?

1/2

1/4

1/8

none

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

3,009.

Which of the following best describes the homologous chromosomes? They are

a product of the division of a chromosome

two identical chromosomes from each parent

chromosomes arranged on spindle fibers during cell division