List of top Life Science Questions asked in GATE EY

In conservation biology, which one or more of the following is/are used to calculate the effective population size, \( N_e \)?
Honey bees are haplodiploid, which means that the relatedness is, on average, expected to be 0.75 between:
Which two of the following processes can result in a decline in heterozygosity in populations? I) Inbreeding; II) Genetic drift; III) Mutation; IV) Random mating
Consider a randomly breeding population of squirrels with two morphs – white-striped and brown-striped. In a population, 16\% are white-striped individuals, while the rest are all brown-striped. The trait for stripes is governed by one gene where the allele for brown stripes is dominant. Assuming Hardy–Weinberg equilibrium, the frequency of the allele for white stripes would be \_\_\_\_\_\_\_\_\_\_\_. (Round off to two decimal places)
In a population, there are two morphs, A and B, which reproduce at equal rates. A mutates to B with probability \(p_1\), and B mutates to A with probability \(p_2\) such that \(p_1 \gg p_2\) (that is, \(p_1\) is much greater than \(p_2\)). Over time, which one of the following statements would be true about this population?
The molecular clock model assumes that mutation rates are:
A few years ago, a very small population of zebrafish became isolated by a newly built dam. As a result, which statement is most likely to be true about this population of zebrafish now?
Which one or more of the following is/are developmental feature(s) of hatchlings of an altricial bird species?
Which one or more of the following is/are characteristic of r-selected animals?
Which one or more of the following options describe(s) how ferns differ from angiosperms and gymnosperms?
Compared with bony fish, many shark species show steeper population declines in response to heavy fishing pressure. Which one of the following options explains this?
Whales and dolphins are hypothesized to have evolved along the northern shore of the Tethys Sea, prior to the Indian plate’s collision with the Eurasian plate. To which one of the following animals are these aquatic mammals most closely related?
The table below lists different insects and taxonomic orders. Choose the option that matches the animal to its correct taxonomic order. Animal Taxonomic order P) Moths i) Hemiptera Q) True bugs ii) Orthoptera R) Crickets iii) Coleoptera S) Beetles iv) Lepidoptera v) Diptera
In haplodiploid organisms, males are haploid and females are diploid. Consider the relatedness diagram shown below. Female A has a full-sister, Y, who has a daughter, B. The relatedness between A and B is ___________. (Rounded off to three decimal places)
The production of anthocyanin pigments in pea flowers requires the presence of at least one dominant allele in each of two independently assorting genes, C and P. The presence of anthocyanin results in purple flowers, whereas its absence gives white flowers. A cross between two double heterozygous (CcPp) plants is performed. What is the expected ratio of plants with purple flowers to plants with white flowers?
Match the diseases to the pathogens that cause them. Diseases Pathogens P) Avian malaria i) Virus Q) COVID-19 in humans ii) Plasmodium R) Chytrid disease in frogs iii) Mosquito iv) Fungus