List of top Questions asked in ICAR AIEEA (PG)- 2023

A female Drosophila contains two XX chromosomes while a male Drosophila contains only one X chromosome. However, the amounts of enzymes or even RNA produced by the X-linked genes in the females are equal to those in the males. The reasons are -
(A) The translation machinery in the female is not as efficient as that in the male Drosophila
(B) The X-linked genes in the female Drosophila are highly regulated to make a balance in the expression of genes between males and females
(C) One X-chromosome in the female Drosophila is inactivated
(D) The Y-chromosome in the male Drosophila acts as an X-chromosome to make a balance in product development.
Choose the correct answer from the options given below :

The consequences of G $\times$ E interaction in a plant breeding experiment are -
(A) It reduces the association between phenotypic and genotypic values
(B) It makes a selection from one environment to perform poorly in another environment
(C) It affects the estimate of heritability, genetic advance, and dominance ratio
(D) It makes the selection of a breeding program much easier
Choose the correct answer from the options given below:

The demerits of Mass Selection in self-pollinated crops include -
(A) Varieties developed by Mass selection are quite easy to identify in the seed production program
(B) It is not possible to know phenotypic superiority of the selected plants is due to genotype or environment
(C) Varieties selected through Mass selection are not as uniform as Pure-line varieties
(D) Zygosity (homozygous or heterozygous) of the selected plants is not known

In a field experiment conducted under RBD, the number of replications and the treatments should be adjusted in such a way that the error degree of freedom (d.f.) becomes :
(A) $<$ 12
(B) At least 12
(C) 12 or more
(D) n-12

The main features of the ideotype proposed by Donald (1968) for wheat include -
(A) Single, short, strong stem
(B) Erect leaves
(C) Large ear
(D) Absence of awns

Arabidopsis thaliana is advantageous for plant genetic research, because -
(A) It is a small plant with a short life cycle
(B) It is a commercially important oilseed crop with a botanical closeness with almost all the cereal crops
(C) It has a small genome size with known sequence information
(D) It can be raised inexpensively

It has been observed in some cases that a particular quality trait is not expressed as such in the wild species, but it is detected only in the segregates recovered from its cross with the cultivated relatives; such traits are known as -

Occurrence of unreduced gametes (i.e. 2n) has been reported in several crops including potatoes. Unreduced gametes can be produced by -
(A) First-division restitution
(B) Parallel spindle in the second meiotic division
(C) Second division restitution
(D) Occurrence of third meiotic division

Two genes say A and B, are sex-linked genes in Drosophila melanogaster. Which of the following statements about the genes are correct ?
(A) A and B may be linked
(B) A and B may also have a 50% recombination frequency
(C) A and B are linked and can recombine only in males
(D) A and B are located in the same linkage group

Which one of the following is NOT a component of heat stress tolerance in crop plants ?

Fixation of heterosis can NOT be achieved by -

Genetic homeostasis, which confers a population wider adaptability is, however, NOT exploited by -

Which one of the following information can NOT be obtained from a 'progeny test' ?

When several genes are considered together, the proportion of homozygotes for all the genes in a backcross generation in self-pollinated crops is given by the formula :

If the frequency of males affected with an X-linked recessive allele in a human population is 0.10 (1 in 10), what will be the expected frequency of affected females ?

Which one of the following is NOT a path of genetic information flow as per the modern Central Dogma of Biology ?

If an autosomal recessive disorder, which shows Hardy-Weinberg equilibrium, has an incidence of 1 in 6400, then the frequency of a carrier is approximately -

The following genotypes are found in a population: AA/35, Aa/25, and aa/10. What are the allele frequencies of A and a ?

An example of 'primary introduction' of crop varieties in plant breeding in India is -

If you have 5 nucleotides, say A, T, G, C and X, how many triplet codons you could have formed from it ?

Identify the nutrient elements in crop plants, capable of getting redistributed under deficiency conditions in descending order:

Identify the synthetic inhibitors used in crop plants
(A) Maleic Hydrazide
(B) Chlormequat Chloride
(C) Paclobutrazol
(D) Triidobenzoic acid
Choose the correct answer from the options given below:

Identify the crop plants based on the amount of water consumed per gram of $\text{CO}_2$ fixed:
(A) Cowpea < Wheat < Redgram
(B) Tomato < Pineapple < Sorghum
(C) Pineapple < Maize < Rice
(D) Soybean < Sugarcane < Brinjal
Choose the correct answer from the options given below:

A nonsense mutation involves the creation of a an -

Along with JD Watson, Francis Crick and Maurice Wilkins, Rosalind Franklin also contributed significantly towards the development of double helical structure of the DNA. All but Rosalind Franklin was awarded with the Nobel Prize. The reason for not awarding Nobel Prize to Roslind Franklin was -