In honey bee queen and workers are diploid while male are haploid. If a queen honey bee is fertilized with equal number of sperms from two different males, then genetic […]
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CSIR NET Life Science Previous Year Questions and Solution on Brain, Behavior and Evolution
Why Honey Bees Share More Genes with Sisters Than Daughters: The Role of Haplodiploidy
Honey bee shares more its genes with sister (75%) as compare to its daughter (50%) due to (1) Eusocialbilty (2) Kin selection (3) Haploidy diploidy sex determination system (4) Parthenogensis […]
CSIR NET Life Science Previous Year Questions and Solution on Brain, Behavior and Evolution
What Eusocial Societies Are—and Are Not: Understanding Reproductive Roles in Social Insects
Eusocial societies are NOT characterized by which of the following? (1) Altruism (2) Kin selection (3) Guarding against intruders (4) Equal reproductive opportunities Core Characteristics of Eusocial Societies […]
CSIR NET Life Science Previous Year Questions and Solution on Brain, Behavior and Evolution
Haplodiploidy and Genetic Relatedness: Why Eusocial Insect Sisters Are Closer Than Offspring
In eusocial insects, males develop from unfertilized eggs while females develop from fertilized eggs. The ultimate consequence of this difference is that (1) in any colony there are always more […]
CSIR NET Life Science Previous Year Questions and Solution on Brain, Behavior and Evolution
Kin Selection in New World Monkeys: Why Some Females Suppress Reproduction to Help Relatives
In some species of new world monkeys, only one female reproduces in a group. One or more younger females have suppressed reproduction and assist the reproductive female. This is an […]
CSIR NET Life Science Previous Year Questions and Solution on Brain, Behavior and Evolution
Kin Selection in Honey Bees: Why Worker Bees Help the Queen Reproduce
Worker bees, instead of themselves reproducing, help the queen reproduce. This behaviour is explained as an example of (1) kin selection (2) group selection (3) sexual selection (4) natural selection […]
CSIR NET Life Science Previous Year Questions and Solution on Brain, Behavior and Evolution
Hamilton’s Rule and Altruism: How Much Benefit Justifies Uncle-to-Nephew Care?
The genetic relatedness (r) of an individual to his nephew is 0.25. The alleles that cause uncles to care for nephews will spread, according to Hamilton’s Rule, only if the […]
CSIR NET Life Science Previous Year Questions and Solution on Brain, Behavior and Evolution
How Honey Bees Maintain Genetic Variation Among Workers: The Secrets Behind Hive Diversity
Honey bee keep variations among the workers by (1) Matting with males many times (2) Parthenogenesis (3) Utilizing different environment conditions (4) Extensive recombination during oogenesis The Genetic Basis […]
CSIR NET Life Science Previous Year Questions and Solution on Brain, Behavior and Evolution
How to Calculate Inclusive Fitness: A Practical Example Using Offspring and Indirect Kin Benefits
Inclusive fitness of an animal can be measured as a sum of direct fitness and indirect fitness. Imagine you have 10 off springs. Through diligent parental care, 5 survive to […]
CSIR NET Life Science Previous Year Questions and Solution on Brain, Behavior and Evolution
Hamilton’s Rule in Family Altruism: When Should You Help a Relative?
Assume that individual A wants to do an altruistic act to individual B and that benefit and cost of doing this act are, in ‘fitness’ units, 40 and 12, respectively. […]
