BIOLOGY

JAMB 2011 - Question 45

Biology 2011 JAMB Past Questions - Question 45: The crossing of individuals of the same species with different genetic characters is

Choose the most appropriate option for the gap .
The crossing of individuals of the same species with different genetic characters is
A:
B:
C:
D:
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Correct Answer

C

Explanation

Non disjunction is the inability of a pairof chromosomes to separate during the formation of gametes (spermatozoa andeggs). This results in,a. Onegamete having both members of the given chromosOitiepair.b. Theother gamete not having any member of the chromosome pair.Polygenic inheritance is the inheritanceof a character, the expression of which is controlled by many genes that arelocated at different loci (positions) on the chromosome. This differs or 48. deviatesfrom the usual Mendelian law that states that a character is controlled by apairof genes.