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True or false? Inbreeding can increase the frequency of
a harmful allele in a population’s gene pool
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- A farmer is raising rabbits. The average body weight in his population ofrabbits is 3 kg. The farmer selects the 10 largest rabbits in his population,whose average body weight is 4 kg, and interbreeds them. If the narrowsenseheritability of body weight in the rabbit population is 0.7, what is theexpected body weight among the offspring of the selected rabbits?The level of inbreeding is proportional to the FST value. (True or false) Inbreeding attenuates heterozygosity. (True or false)The frequency of a recessive allele in a population is 50%. What is the frequency of the dominant allele?
- In a population that is in HW equilibrium, 38% of individuals are recessive homozygotes for a certain trait. In a population of 14,500, calculate the percentage of homozygous dominant individuals and heterozygote individuals.Random events are know to contribute to changes in allele frequencies. Do these random events typically play a greater role when the population size is large or small?A population in HW equillibrium is taken into the lab for an experiment in which inbreeding occurs. The inbreeding coefficient is 0.6. The original population is genotyped to determine the alleles present at the A locus, and the following frequencies of the three genotypes is observed: AA 0.49 Aa 0.42 aa 0.09 What is the expected frequency of aa individuals in the next generation? A. 0.258 B. 0.216 C. 0.09 D. 0.184
- Explain why the sickle cell allele remained in populations that lived in very wet regions, despite it causing harm to people who are homozygous for that allele (i.e. explain the heterozygous advantage).It is estimated that every human carries at least one recessive lethal allele (i.e. they are heterozygotes at that locus). What maintains these alleles in populations given their lethality when homozygous? Group of answer choices heterozygote disadvantage mutation/selection balance inbreeding genetic driftThreatened species often have small, isolated populations where mating between relatives occurs. Let's assume one of these threatened species has a disease controlled by a gene that has two alleles A and a. Only individuals with two copies of the "a" allele have the disease and die before reproducing. Question: What are the effects of inbreeding on the frequency of the "a" allele, and the frequency of the disease in the population?
- A population of 30 hamsters have either a black coat (BB or Bb) or a white coat (bb). There are 10 BB homozygotes, 10 Bb heterozygotes, and 10 bb homozygotes in the population. What is the frequency of the b allele in this gene pool? 10% 30% 50% 67%In a population experiencing no selection, genetic drift, gene flow, mutation or non random mating, the allele frequencies at a locus where the R allele is dominant over the r allele, are as follows. R= 0.3 r=0.7 What is the expected heterozygosity of the population at that locus?Under genetic drift, if an allele’s frequency is 1%, what is the likelihood that it will be lost from the population? part B; Construct a graph that describes the likelihood of fixation of a particular allele, for a small population that is under Wright-Fisher genetic drift. Don’t forget to label axes completely.