NEET BIOLOGY

GENETICS AND EVOLUTION

GENETIC BASIS OF INHERITANCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How are Pedigrees used to track diseases?
A
To predict the probability of the offspring having the disease by shading in the individuals affected by hypercholesterolemia that is transmitted genetically
B
To predict the probability of the offspring having immunity to a disease by using a punnet square
C
To predict the probability of the offspring having the disease by shading in the individuals affected by a disease that is transmitted genetically.
D
To predict the probability of the offspring having the disease by using a punnet square
Explanation: 

Detailed explanation-1: -A pedigree shows relationships between family members and indicates which individuals have certain genetic pathogenic variants, traits, and diseases within a family as well as vital status. A pedigree can be used to determine disease inheritance patterns within a family.

Detailed explanation-2: -By analyzing a pedigree, we can determine genotypes, identify phenotypes, and predict how a trait will be passed on in the future. The information from a pedigree makes it possible to determine how certain alleles are inherited: whether they are dominant, recessive, autosomal, or sex-linked.

Detailed explanation-3: -A pedigree, as related to genetics, is a chart that diagrams the inheritance of a trait or health condition through generations of a family. The pedigree particularly shows the relationships among family members and, when the information is available, indicates which individuals have a trait(s) of interest.

Detailed explanation-4: -One trick for identifying a recessive trait is that if a trait skips a generation in a pedigree, it is often an autosomal recessive trait (although a trait can be autosomal recessive and not skip generations). These traits appear with equal frequency in both sexes.

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