SCIENCE
GENETIC AND MENDELS LAW OF HEREDITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Fewer sex chromosomes are transferred to the daughters
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Sex chromosomes are transferred only from mother to son
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Sex is determined by the mother
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Sex linked characters find immediate expression in man
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Detailed explanation-1: -Males have 1 X chromosome and 1 Y chromosome, and females have 2 X chromosomes. The genes that can give you red-green color blindness are passed down on the X chromosome. Since it’s passed down on the X chromosome, red-green color blindness is more common in men.
Detailed explanation-2: -Each daughter has a 50% chance of being a carrier and each son has a 50% chance of being color blind. The daughters who are carriers can have color blind sons with the same logic.
Detailed explanation-3: -Option C is correct. Note: The son inherits the X genes from the mother. The colour blind or the carrier women can produce colour blind son. Colour blind daughters can only be born if the father is colour blind and the mother is either colour-blind or carrier.
Detailed explanation-4: -Colour blindness is one of the common genetic disorders observed in all human populations. It is a sex-linked recessive trait. The genes are located on the X chromosome within the Xq28 band.