MHT CET · BIOLOGY · STD 12 - 3. Inheritance and Variation
Recessive gene present on non homologous part of only one X chromosome of humans will _________ .
- A cause pleiotropism
- B be expressed only in females
- C be expressed only in males
- D will not be expressed either in males or females
Answer & Solution
Correct Answer
(C) be expressed only in males
Step-by-step Solution
Detailed explanation
In humans, males have one chromosome and one Y chromosome (XY), while females have two X chromosomes (XX). If a recessive gene is present on the non-homologous part of only one X chromosome, it will be expressed in males because they do not have another X chromosome to mask the expression of the recessive gene. Females, on the other hand, have the possibility of having a dominant allele on their other X chromosome, which can suppress the expression of the recessive gene.
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