The following questions refer to this information: In the year 2500, five male s
ID: 19955 • Letter: T
Question
The following questions refer to this information: In the year 2500, five male space colonists and five female space colonists from Earth settle on an uninhabited Earthlike planet in the Andromeda galaxy. The colonists and their offspring randomly mate for generations. All ten of the original colonists had free ear lobes, and two are heterozygous for that trait. The allele for free ear lobes is dominant to the allele for attached ear lobes.What is the allele frequency in the founding population?
Explanation / Answer
The following questions refer to this information: In the year 2500, five male space colonists and five female space colonists from Earth settle on an uninhabited Earthlike planet in the Andromeda galaxy. The colonists and their offspring randomly mate for generations. All ten of the original colonists had free ear lobes, and two are heterozygous for that trait. The allele for free ear lobes is dominant to the allele for attached ear lobes.
What is the allele frequency in the founding population?
by using gene count method
number of indidvdiuals=10
All ten of the original colonists had free ear lobes, and two are heterozygous for that trait
free ear lobe=8/10-------------homozygous--------D
free ear lobe=2/10-------------heterozygous--------H
attached ear lobes =0/10-----homozygous---R
frequency of attached ear lobes = R +H/2= 0+ .2/2= 0.1
ACCORDING TO HARDY WEINBERG LAW
P+Q=1
HENCE
. 0.1 -------------a-----------attached ear lobe ALLELfrequency
0.9--------------- A-----------free ear lobe ALLELfrequency
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