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# What is the coefficient of relatedness of two sisters of eusocial ants a haplodiploid Hymenoptera?

## What is the coefficient of relatedness of two sisters of eusocial ants a haplodiploid Hymenoptera?

In haplodiploid organisms, the relatedness between full sibling sisters (r = 0.75) is greater than between a mother and her offspring (r = 0.5), thus weighting Hamilton’s rule in favor of raising sisters rather than offspring.

## How related are sisters in a bee colony?

In bees, sisters are 75 percent related to each other. If a female bee had an offspring, she would only be 50 percent related to it because an animal can only pass down half of its genetic material.

What is the haplodiploid hypothesis?

The ‘haplodiploidy hypothesis’ argues that haplodiploid inheritance in bees, wasps, and ants generates relatedness asymmetries that promote the evolution of altruism by females, who are less related to their offspring than to their sisters (‘supersister’ relatedness).

### What is the difference between haploid diploid and haplodiploid genetic systems?

In haplodiploid animals, one gender is haploid (one copy of each chromosome) and the other is diploid (two copies of each chromosome). In the Hymenoptera (bees, ants, and wasps), males are haploid, meaning they have no father; their single set of chromosomes comes from their mother.

### How do you calculate relatedness?

In general, when parents are related to each other by r′, they are related to their offspring by ½+½ r′ and these offspring are related to their siblings by ½+½ r′. When there is no inbreeding, r′ = 0 and we get the usual r = ½ for parent-child and sibling-sibling relatedness.

What is meant by the term haplodiploid?

Definition of haplodiploidy : sex differentiation in which haploid males are produced from unfertilized eggs and diploid females from fertilized eggs (as in certain insects)

#### What is the coefficient of relatedness between second cousins?

6.25% (4⋅2−6) 6. sester-second cousin. 7.8125% (5⋅2−6) 6.

#### What is the coefficient of relatedness between first cousins?

Between siblings and between parents and offspring, the coefficient of relatedness is . 5; between uncles or aunts and nieces or nephews and between grandparents and grand-offspring, it is . 25; and between first cousins, it is . 125.

How is the coefficient of relatedness R computed?

FEEDBACK: The r in Hamilton’s rule (rb > c) equals the average coefficient of relatedness between individuals; b is the sum of fitness benefits of a certain behavior, and c equals the corresponding fitness cost. The coefficient of relatedness, r, measures the genetic relationship between interacting individuals.