Recent questions and answers in Genetics and Evolutionary Biology

Match the genetic disorders in Column $\text{I}$ to the corresponding underlying cause in Column $\text{II}$\[\begin{array}{|l|l|}\hline\text{Column I} & \text{Column II}...

A disease-associated allele shows $\text{X}$-linked recessive inheritance. If the mother is a carrier of the disease, the father is genetically normal and the child born ...

​​​The blood group of the mother is $\mathrm{A}^{+}$and that of the father is $\mathrm{AB}^{+}$. Which of the following statements is/are correct?Probability of the offsp...

Mendel's 'law of segregation' applies to the segregation of $\_\_\_\_\_\_\_\_$ during gamete formation.mitochondrial genesalleles of a genelinked genes on the same chromo...

The evolution of wings in bats and insects is an example of $\_\_\_\_\_\_\_$ evolution.convergentdivergentneutralparallel

Determine the correctness or otherwise of the following Assertion $[\text{a}]$ and the Reason $\text{[r]}$.Assertion $\text{[a]}$: Chromosome mutations can change the str...

Fabry disease in humans is a X-linked disease. The probability (in percentage) for a phenotypically normal father and a carrier mother to have a son with Fabry disease is...

Assuming independent assortment and no recombination, the number of different combinations of maternal and paternal chromosomes in gametes of an organism with a diploid n...

Which of the following conditions will contribute to the stability of a gene pool in a natural population?Large populationNo net mutationNon-random matingNo selection $...

The order of genes present in a chromosome is as followsWhich one of the following rearrangements represents a paracentric inversion?

In a Mendel’s dilhybrid experiment, a homozygous pea plant with round yellow seeds was crossed with a homozygous plant with wrinkled green seeds.$F_1$ intercross produced...

In a random mating population, $Y$ and $y$ are dominant and recessive alleles, respectively. If the frequency of $Y$ allele in both sperm and egg is $0.70$, then the freq...

In pea plants, purple color of flowers is determined by the dominant allele while white color is determined by the recessive allele. A genetic cross between two purple fl...

In tomato plant, red ($R$) is dominant over yellow ($r$) for fruit color and purple ($P$) is dominant over green ($p$) for stem color. Fruit color and stem color assort i...

Match the type of chromosomal inheritance (Column-I) with the corresponding genetic disease or trait (Column-II).$\begin{array}{|l|l|l|l|} \hline & \textbf{Column-I} & & ...

A crossing was performed between the genotypes $\textit{DdEeFfgg}$ and $\textit{ddEeFfGg}$. Assuming that the allelic pairs of all genes assort independently, the proport...

A pedigree of an inheritable disease is shown below.This inheritable disease is$X$-linked dominant$X$-linked recessive or Y-linkedonly $Y$-linkedonly $X$-linked recessive

An isolated population on an island has the following genotypic frequencies: $$\begin{array}{|c|c|c|c|} \hline \textrm{Genotype} & AA & Aa & aa \\ \hline \textrm{Frequenc...

In a relatively large but finite and closed population of sexually reproducing diploid organisms, the frequency of homozygous genotype PP changes from 0.40 to 0.50 and th...

Consider a population of $10,000$ individuals, of which $2500$ are homozygotes (PP) and $3000$ are heterozygotes (Pp) genotype. The frequency of allele p in the populatio...

In a genetic cross between the genotypes $WWXX$ and $\text{wwxx}$, the following phenotypic distributions were observed among the $F_2$ progeny: $\text{WX, 562; wx, 158; ...

A dioecious plant has $XX$ sexual genotype for female and $XY$ for male. After double fertilization, what would be the genotype of the embryos and endosperms?$100\%$ ovul...

In a genetic study, $80$ people were found to have alleles for polydactyly. Only $36$ of them were polydactylous. What is the extent of penetrance percentage? ___________...

Match the terms in $\textbf{Group I}$ with the ploidy in $\textbf{Group II}$.$\begin{array}{|C|l|C|l|} \hline &\textbf{Group I} & {} &\textbf{Group II} \\\hline P. &\text...

The direction of shell coiling in the snail $\text{Limnaea peregra}$ is a classic example ofchromosomal inheritanceextra-chromosomal inheritancechromosomal translocationh...