Principle of Inheritance and VariationHard
Question
The recessive genes located on X-chromosome in humans are always
Options
A.lethal
B.sublethal
C.expressed in males
D.expressed in females
Solution
The recessive genes located on X-chromosome in humans are always expressed in males because a female may be homozygous or heterozygous whil male is always hemizygous (ie, only one allele is present). Haemophilia, colourblindness are some human diseases which are fre quently foundin males.
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