Exam 10: Mendel, Genes, and Inheritance

In snapdragons the red allele C^R is incompletely dominant over the white allele C^W. If you were to cross two pink snapdragons, what percentage of the progeny will be pink?

What is the key difference between incomplete dominance and codominance?

Suppose your mother has albinism, which is a recessive trait. Suppose also that your father has cystic fibrosis, which is also caused by a recessive trait. And, you learn that your father-in-law has albinism and cystic fibrosis. What are the odds that your first child will have both albinism and cystic fibrosis?

Match each term with its correct definition. -recessive

The environment can impact the phenotype encoded by polygenic inheritance.

According to the blending theory of inheritance that predominated before 1900, what colour of progeny would result from the mating of a white flower and a red flower?

Polygenic inheritance is proof of parental traits blending in the next generation according to the blending theory of inheritance.

Match each term with its correct definition. -homozygous

Which of the following conditions is subject to epistasis?

Who established the connection between genes, meiosis, and fertilization?

Cross-pollination occurs within a single plant while self-pollination occurs between two plants.

Dwarf pea plants have deficient levels of the hormone gibberellin.

Suppose that an F₁ dihybrid cross results in a phenotypic ratio of 9:3:4. What does this tell you?

Match each term with its correct definition. -monohybrid

Mendel performed a testcross with his plants and all the resulting progeny had the same colour. What information did this testcross provide?

Suppose that your mother and father both have cystic fibrosis, which is caused by a recessive allele. What are the odds of you having cystic fibrosis?

Match each term with its correct definition. -dihybrid

Match each term with its correct definition. -heterozygous

Match each term with its correct definition. -pleiotropy

Match each term with its correct definition. -genotype