Question

Sita has $3$ daughters and her mother-in-law accused her of having daughters. But when they counseled by a doctor, she stops accusing Sita because-
A. Paternal genetic influence
B. Maternal genetic influence
C. Extrachromosomal inheritance
D. Mendelian inheritance

Answer 1

As we know that, in a dihybrid cross- we can determine whether the individual is homozygous or heterozygous dominant. In a test cross, an individual breed with another individual that is homozygous for the recessive trait and offspring of the test cross is determined. This test has two possibilities- if any offspring produced express the recessive trait, the individual is heterozygous for the dominant allele. If all the offspring produced express dominant traits, the individual is homozygous for the dominant allele.

Complete answer:
Option A: Paternal genetic influence – paternal genetic influence where the genotype of a child is depends on the paternal side that is XY chromosomes. The genetic characteristics will be similar to the father than the mother.
Option A is the correct answer.
Option B: Maternal genetic influence- maternal genetic influence is where the genotype of a child will depend on maternal genotype not paternal such as a girl having XX chromosomes.
Option B is not the correct answer.
Option C: Extrachromosomal inheritance- extrachromosomal DNA is the plasmid DNA which carries genes of interest to be cultured invitro or in vivo conditions.
Option C is not the correct answer.
Option D: Mendelian inheritance- sir Gregor Mendel in $1900$ discovered seven characters both genotype and phenotype in a pea plant. Those characters are called Mendelian inheritance.
Option D is not the correct answer.

Hence, Option A is the correct answer.

Note:
As we know that Each organism carries two copies of each trait- one was dominant trait and one is recessive. Dihybrid cross refers to the involvement of two sets of allelic pairs. Dihybrid can be a test cross. As we know, dwarf, tall, pink all are Characteristics of phenotype or morphological characters. The test cross is an experiment showcased by Gregor Mendel, in his studies of the genetics of pea plants.