Choose from the following list the three genotypes the parents must have in order for a daughter to have xbxb ?
xbxb
xbxb
xy
xbxb
xbyb
xbyb
xby

The correct answer is- XbYb, XbXb, XbY

As per the question, the genotype of daughter is- XbXb.

Females have XX genotype and they transmit X chromosome to their progeny whereas males have XY genotype and they transmit X chromosome to their daughter progeny and Y chromosome to their male progeny.

In other words, a daughter inherits one X chromosome from father and another X chromosome from mother. In order to have XbXb genotype, the parent must possess the Xb chromosome.

Therefore, the three genotypes that parents must have in order form a daughter with XbXb are- XbYb, XbXb, XbY

d. changes in climate and historical records

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answer; (a) medicalized;