Biology Past Questions

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2346

In humans, sex is determined by

A. two homologous chromosomes
B. a dominant gene for maleness present in a male
C. two similar sex chromosomes in the male and dissimilar in the female
D. the differences in the nature of the X and Y chromosomes in the male.

View Answer & Discuss (7) WAEC 2002

2347

A man with heterozygous genotype for blood group B marries a woman with heterozygous A, what percentage
(%) of their children would be universal donor?

A. 50%
B. 25%
C. 15%
D. 10%

View Answer & Discuss (12) WAEC 2002

2348

The genes affecting the same trait and are located at the same position on the homologous chromosomes
are called

A. autosomes
B. alleles
C. loci
D. chromatids

View Answer & Discuss WAEC 2002

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2349

Which of the following is an adaptation by plants to reduce the rate of water loss in a dry habitat? Possession of

A. a few sunken stomata on the lower epidermis only
B. long leaf tendrils
C. leaves with serrated edges
D. strong tap root

View Answer & Discuss WAEC 2002

2350

The following are social insects except

A. wasps
B. termites
C. bees
D. cotton stainer

View Answer & Discuss WAEC 2002

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