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List of top Biology Questions on Principles of Inheritance and Variation

A man with blood group AB marries a woman with blood group O. What is the probability that their child will have blood group A?
In humans, the condition of color blindness is caused by a recessive allele located on the X chromosome. A color-blind woman marries a man with normal vision. What is the probability that their son will be color-blind?
Which of the following shows recessive traits?
What is the genotype of Drosophila showing normal wings?