An Individual Who Is Heterozygous For Cystic Fibrosis

Question: Continuous variation appears as a ____of traits. An example would be____ . Discontinuous variation appears as ____ traits. An example would be ____.

Answer: blend, human height, distinct, pea color

Question: Hemophilia (H - normal blood clotting, h - abnormal blood clotting) is a sex-linked characteristic in humans. A male has a genotype of XhY. He is ____for the hemophilia gene. He has ____ blood clotting. A female has a genotype of XHXh. She is ____ for hemophilia. She has ____ blood clotting.

Answer: homilygous, abnormal, heterozygous, normal

Question: In pea plants, height is a ____ and short or tall would be a ____ .

Answer: characteristic, trait

Question: The analogous use of P, F1, and F2 generations in plants to humans would make an offspring in F2 ______ to the P generation

Answer: grandsons or granddaughters

Question: An individual heterozygous for cystic fibrosis ________. Cystic fibrosis occurs in individuals who are homozygous recessive for the CFTR gene.

Answer: is a carrier

Question: What is the key to the recognition of codominance?

Answer: The heterozygote expresses the phenotype of both homozygotes.

Question: An individual who is homozygous ________.

Answer: carries two copies of the same allele for a gene

Question: The father determines the gender of the offspring because

Answer: he contributes either an X or a Y to the complimentary X of the egg

Question: In humans, the presence or absence of dimples is a trait controlled by a single gene. What is the genotype of an individual who is heterozygous for dimples?

Answer: Dd

Question: An individual with the genotype AaBb produces four different gametes in equal proportions. This is a demonstration of ________.

Answer: Mendel’s law of independent assortment