Consider a population of 1500 marbled salamanders: 976 are homozygous dominant f
ID: 49687 • Letter: C
Question
Consider a population of 1500 marbled salamanders: 976 are homozygous dominant for blue stomachs, 355 are heterozygous dominant for blue stomachs, and 169 are homozygous recessive for green stomachs. Determine all genotype, phenotype, and allele frequencies. Be sure to chow your work!
Consider a population of 1500 marbled salamanders: 976 are homozygous dominant for blue stomachs, 355 are heterozygous dominant for blue stomachs, and 169 are homozygous recessive for green stomachs. Determine all genotype, phenotype, and allele frequencies. Be sure to chow your work!
1. Consider a population of 1500 marbled salamanders: 976 are homozygous dominant for blue stomachs, 355 are heterozygous dominant for blue stomachs, and 169 are homozygous recessive for green stomachs. Determine all genotype, phenotype, and allele frequencies. Be sure to chow your work!
2. Evolution requires variation. However, intense selection can _______________________________ from a population.
3.Describe what is meant by “Genotypic frequency” and “Allele frequency”.
Explanation / Answer
1. The genotype frequencies for the population will be:
Blue dominant homozygous (p2) = 976/1500
= 0.6507
Blue dominant heterozygous (2pq) = 355/1500
= 0.2366
Green homozygous recessive (q2) = 169/1500
= 0.1127
Allele frequencies for the population will be:
Frequency of Blue (p) = p2 + 1/2 (2pq) = 0.6507 + 1/2 (0.2366)
= 0.769
Frequency of green (q) = 1-p
= .231
The phenotypes of the salamanders are already given as blue and green.
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