Biology
Babikian746
22

Dimples (D) and brown hair (A) are dominant traits. Answer the following questions based on the dihybrid cross shown: 1) What genotype(s) would result in a phenotype of dimples and brown hair? 2) What genotype(s) would result in a phenotype of dimples and blonde hair? 3) What genotype(s) would result in a phenotype of no dimples and brown hair? 4) What genotype(s) would result in a phenotype of no dimples and blonde hair? 5) What is the phenotypic ratio for this cross? (Be sure to use words to indicate which number goes with which phenotype!)

+2
(1) Answers
ludmila

1. DDAA, DdAa 2. DDaa, Dada 3. ddAA, ddAa 4. ddaa 5. The phenotypic ratio is 9:3:3:1 where 9 combinations will produce offspring with both dominant phenotypes (dimples and brown hair), 3 will produce offspring with one dominant phenotype and one receive phenotype (dimples, blonde hair), 3 will produce offspring with one receive phenotype and one dominant phenotype (no dimples, brown hair), and one will produce offspring with both recessive phenotypes (no dimples, blonde hair)

Add answer