Biology Questions

the recessive allele frequency is represented by

A population's response to selection is greater when allele is common then rare. this means A) In one generation. the change in frequency of a lethal allele will be greater when the allele is common B) In one generation, the change in frequency of a lethal allele will be greater when the allele is rare.

A gene that has evolved under positive selection show:

p^2+2pq+q^2 represents: A) the allele frequencies of a diploid autosomal geneB)the genotype frequencies of a diploid autosomal gene

some populations have a high frequency of homozygous genotypes. which of the following would be associated with this outcome? A) this is a population where negative assortative mating has been important. b) the population has probably been through a bottleneck c) this population cannot be in Hardy- weinberg equilibrium D) this is a large population

which of the agents of microevolution tend to make populations in different environments more alike in allele frequency?

There is strong selection against young banded Water Snakes on islands in the great lakes. Nonetheless, the island populations remain polymorphic. In this example, scientist have found:

if a population is in hardy-weinberg equilibrum, and the frequency of one allele is 0.75, what is the frequency of heterozygotes?

all genetic variation ultimately arises from ___

when a population is Hardy-Weinberg equilibrum, which is not changed? number of alleles, frequency of selection, frequency of alleles , number of individuals of individuals

which organism has the fastest mutation rate?

In coding gene, more mutations in the first and second position of the codons ____are compared to the number in the third position

A hypothetical population has two alleles for a gene: A and a. in a random sample of 100 individuals, 20 are homozygous for the "A" allele, 60 are heterozygous, and 20 are homozygous for the "a" . what is the frequency of A?

which of the below situations is an example of gene flow?

there are five main mechanisms of evolutionary change. which mechanism is the only one below that relies on only adaptive evolutionary change? Mutation, non-random mating, genetic drift, natural selection

A trait that confers a greater level of fitness, relative to those who lack it, is called an

Muscular Atrophy is a devastating disease but can be found at surprising high frequencies in European population. What explanation is given for the maintenance of this polymorphism?

when gene flow is happening between two different populations with very different allele frequencies, what is likely results?

In the "smelly t-shirt experiment" females preferred males that carried alleles at the Major Histocompatibility complex that differed from their own. This promotes:

In a species of Jewel Beetle, you find that individuals with the AA genotype produce 100 offspring on-average, individuals with AB produce 75, and individuals with BB produce 50. what is the relative fitness for each genotype (AA:AB:BB)?