Reference no: EM132707887
1. Explain why geneticists use notations like CW and CR to describe white and red alleles associated with genes showing incomplete dominance.
2. A blue-flowered plant is crossed with a red-flowered plant. Describe the phenotype of the offspring if the inheritance pattern is:
a) Codominance
b) Incomplete Dominance
3. In Andalusian birds, a cross between black-feathered birds and white-feathered birds results in blue-feathered offspring.
a) Explain the inheritance pattern associated with this trait.
b) What would the genotypes and phenotypes be for a cross between two blue feathered birds?
4. A farmer crosses a red bull to a white cow. The resulted offspring have a fur with red and white patched and are said to be roan.
a) Explain the inheritance pattern associated with coat color in cattle.
b) What would the genotypes and phenotypes be for a cross between a red bull and a roan cow?
5. In Japanese at 4 o'clock flowers, a white and a red flower produce pink flowers. A researcher studying this flower observed the following results for two experiments:
a) Experiment A - 6 offspring were all pink.
b) Experiment B - 4 offspring were red and 4 offspring were pink Using a Punnett square to determine the genotypes of each set of parents.
6. The storage roots of radishes may be long, round, or oval. In a series of experiments, the following data was obtained:
a) 159 long and 156 oval;
b) 121 long, 243 ovals, and 119 round. Determine the ratio for each set of offspring and then use a Punnett square to determine the genotypes of each set of parents.
7. The incidence of sickle cell in human populations is much higher in equatorial Africa than most other regions of the world. What has been proposed to explain this observation?
8. A couple is considering having a child, but are concerned that their child might be at risk of having sickle cell anemia. Blood tests showed that the man and woman both had normal and sickle hemoglobin in their red blood cells.
a) What is the probability of their children having sickle cell anemia?
b) What is the probability of their children having resistance to malaria?