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.
some were short while others were long
all were long
half of them were long while half were short
three-quarters were long while one quarter were short
Correct answer is B
No explanation has been provided for this answer.
100% tall 0% dwarf
75% tall 25% dwarf
50% tall 50% dwarf
25% tall 75% dwarf
Correct answer is C
A heterozygous tall plant (say Tt) crossed with pure-breeding dwarf plants (tt) will give a set of Tt, Tt, tt and tt. This is 50% tall and 50% dwarf approximately.
Which of the following traits in humans can be affected by environmental factors?
skin colour
eye colour
baldness
tongue-rolling
Correct answer is A
No explanation has been provided for this answer.
What will be the genotypic ratio when two heterozygous red pea plants are crossed?
1 : 0
1 : 2 : 1
2 : 1
3 : 1
Correct answer is B
No explanation has been provided for this answer.
In man, sex is determined by the inheritance of
a pair of homologous chromosomes
an extra chromosome in the cells of a female
a dominant gene for maleness present in man
two similar X chromosomes in the female and X and Y chromosomes in the male
Correct answer is D
No explanation has been provided for this answer.