Genetic drift: a) increases as the population size increases b) occurs as the re
ID: 84968 • Letter: G
Question
Genetic drift: a) increases as the population size increases b) occurs as the result the dominant allele c) always increases the frequency of d) deviation If the frequency of recessive in a population is 0.04, what is the frequency of the dominant allele? Assume population is in equilibrium and only the dominant and the alleles exist. recessive a) 0.01 b) 0.2 c) 0.7 d) 0.8 If a population is in Hardy-Weinberg equilibrium, then is subsequent generations, one can expect that: a) heterozygote's will continue to increase b) recessive homozygote's will decrease c) dominant genes will increase d) the proportion of all phenotypes will remain constant e) heterozygote's will be selected against The offspring of inbred zoo animals survive the offspring from no inbred animals. a) more often than b) less often than c) as often as In the human genome a) many genes do NOT have intones b) less than 5% of the DNA codes for unique proteins c) polycot runic messages (operands) are common d) the genes are all unique to humans and show no similarity to genes from other organisms. It is currently estimated that the human proteome contain proteins. a) 500 b) 2000 c) 20,000 d) 200,000 In a large population, the frequency of a recessive allele is always lower than the frequency of a dominant allele. a) true b) false In bacteria:Explanation / Answer
47. d Genetic drift occurs by chance deviation.
Genetic drift is a process in which allele frequencies within a population change by chance alone due to random sampling from generation to generation.
48. d. 0.8
The frequency of homozygous recessive individuals (that is the genotype) q2=0.04
therefore q= square root of 0.04= 0.2
From Hardy Weinbergs equilibrium, we know that p+q= 1, where p= frequency of dominant allele and q= frequency of recessive allele.
So= p=1-q=1-0.2= 0.8.
So, the frequency of the dominant allele, p is 0.8
49. d The proportion of all phenotypes will remain constant in a population that is in HW equilibrium.
The Hardy–Weinberg equilibrium states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences.
51.b In the human genome less than 5 % of the DNA codes for unique proteins.
In fact less than 2 % of the human genome codes for proteins. The remaining ~ 98% is non coding DNA.
52. c. The human proteome contains about 20,000 proteins.
53 a. True. In a large population the frequency of the recessive allele is always lower than that of the dominant allele.
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