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Presence of horns and Coat color are controlled only by few genes. True or False
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- Which of the following traits in humans demonstrates codominance? height eye color blood typesShank color and plumage color are highly affected by the environment. True or FalseFor each phenotype below, list the genotypes (remember to use the letter of the dominant trait) Curly hair is dominant to straight hair. . ____ straight ____ curly ____ curly
- Color-blindness is a sex-linked trait. A boy, whose parents and grandparents had normal vision, is color-blind. What are the genotypes for his mother and his maternal grandparents? Show all workIncomplete penetrance can make autosomal dominant traits skip generations within a family tree. True or False.A person who is a carrier for a genetic trait ___________. a. is heterozygous for a dominant trait b. is heterozygous for a recessive trait c. is homozygous for a recessive trait d. could be either a or b but not c
- In superheroes, the gene for superstrength has two alleles. The dominant allele (S) codes for normal strength and the recessive allele (s) codes for superstrength.A normal woman marries a man whose mother is colorblind. What is the probability of their children having color blindness? What percent is phenotypically normalAnswer is: incomplete dominance, variable expressivity because in incomplete dominance, heterozygotes have a phenotype in between the homozygous dominant and recessive (described here as "less hair"). In variable expressivity, individuals with the same genotype have variations in severity of the same phenotype. Both of these characteristics are displayed in this example.
- Autosomal dominant traits cannot skip generations within a family tree. True or False.People with recessive disorders are usually born to normal parents who are both heterozygotes which means that both parents are carriers of the dominant allele for the disorder but appear normal themselves. Select one: True FalseWavy hair is incomplete dominance of curly hair. If a wavy-haired woman has children with a straight-haired man, what are the possible genotypes and phenotypes? Be sure to use the correct shorthand that shows neither gene is recessive.