For each problem: 1. define the alleles and describe the dominance hierarchy - \
ID: 3166443 • Letter: F
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For each problem: 1. define the alleles and describe the dominance hierarchy - "define the alleles" means that you need to tell me what allele each letter that you're using represents. - the "dominance hierarchy" tells me which allele is dominant, recessive, codominant, incompletely dominant, etc. - you should also tell me in this section if the gene is not autosomal i.e. if it is sex-linked 2. write out the cross phenotypically 3. write out the cross genotypically 4. draw the Punnett square Don't repeat the same gamete from the same individual 5. the question will ask you to do one or more of the following: a. calculate the phenotypic ratio of the offspring This ratio should be in the least common denominators if you didn't repeat the same gamete from the same individual when doing the Punnett square b. calculate the genotypic ratio of the offspring This ratio should be in the least common denominators if you didn't repeat the same gamete from the same individual when doing the Punnett square c. determine some probability Questions are on the backExplanation / Answer
1. Red flower RR X White flower rr
F1 Rr Pink color
Red flower RR X Pink color Rr
F2 RR Red flower : Rr Pink flower
Genotypic ratio 1 : 1
Phenotypic ratio 1 : 1
2. Father XaY X Mother XAXA
F1 XAXa She not hemophilic X XAY
F2 XAXA XAXa XAY XaY
Probability = 1/4. XaY Hemophilic son
3. Man hemophilia XaY X Female XAXA
Probability = 0
4. red-green color blindness is a sex linked recessive trait
Normal vision XCY X Colorblind XcXc
XCXc-Normal vision : XcY - Colorblind Male
Probability = 0
5. Autosomal recessive aa - Sickle cell
Red-green color blindness is a sex linked recessive trait
Sickle cell and hemophilia aaXcY X AaXCXC Normal sickle cell and no hemophilia
Gametes Xca / aY X XCA / XCa
F1 XCXcAa XCXcaa XCYAa XCYaa
Probability 2/4 = 1/2
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