Apr04Lecturebw[1]

Apr04Lecturebw[1] - Example Exam Question. A couple...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Example Exam Question… A couple planning to have children are tested and it turns out that they are both heterozygous for a certain gene with two alleles. Homozygous recessives at this locus exhibit developmental abnormalities. What is the chance their child would be normal? a) 0% b) 25% c) 50% d) 75% e) can’t tell with the information provided
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Population Genetics • Population = group of interbreeding individuals • Population Genetics – study of allele/genotype frequencies in populations – understand why populations change (evolve) *Population Genetics Handout posted to SmartSite
Background image of page 2
Genetics in Populations • 1) Calculate genotype and allele frequencies – f(AA) = 500/1000 = 0.50 – f(Aa) = 300/1000 = 0.30 – f(aa) = 200/1000 = 0.20 • f(A) = 0.65 • f(a) = 0.35 0.5 + 0.15 = 0.65 = f(A) 0.2 + 0.15 = 0.35 = f(a)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Genetics in Populations • YY = green • Yy = green • yy = blue • Budgie Island Allele Frequencies – F(Y) = 0.8 – F(y) = 0.2 Melopsittacus undulatus (Budgie)
Background image of page 4
Genetics in Populations • Predict the genotype frequencies in the next generation? – Budgie Island Allele Frequencies • F(Y) = 0.8 • F(y) = 0.2 f(Y) = 0.8 f(y) = 0.2 f(Y) = 0.8 f(y) = 0.2 SPERM OVA
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Genetics in Populations • Predict the genotype frequencies in the next generation? – Budgie Island Allele Frequencies • F(Y) = 0.8 • F(y) = 0.2 f(Y) = 0.8 f(y) = 0.2 f(Y) = 0.8 f(y) = 0.2 f(YY) = 0.64 f(yY) = 0.16 f(Yy) = 0.16 f(yy) = 0.04 SPERM OVA
Background image of page 6
Genetics in Populations • Predict the genotype frequencies in the next generation? – Budgie Island Allele Frequencies • F(Y) = 0.8 • F(y) = 0.2 – Genotype Freq. – YY = 0.64
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 32

Apr04Lecturebw[1] - Example Exam Question. A couple...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online