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Homework answers / question archive / Foothill College ANTH 001 Module: 4 1)In a hypothetical situation, B is the allele that causes brachydactyly

Foothill College ANTH 001 Module: 4 1)In a hypothetical situation, B is the allele that causes brachydactyly

Anthropology

Foothill College

ANTH 001

Module: 4

1)In a hypothetical situation, B is the allele that causes brachydactyly. If a man who has normal fingers (bb) and a woman with brachydactyly (Bb) have children, what proportion of these children would you expect to have

normal fingers? (Hint: Use a Punnett square).

  1. Gregor Mendel:
  2. Which of the following types of traits are governed by more than one

genetic locus?

  1. Recessive conditions are usually associated with the lack of production of

an enzyme.

  1. Genetic pleiotropy refers to the way the action of one gene affects several

different traits.

  1. Which statement(s) concerning polygenic traits is/are FALSE?
  2. Which gene with two alleles makes a greater contribution to melanin

production?

  1. All variation in mtDNA is caused by mutation.
  2. The genotype for a man with hemophilia is XhYh.

11. A woman has the genotype XCXc and a man has the genotype XcY. They

have a 25% chance of having a female child who is colorblind.

12. A woman with normal skin pigmentation has five children with an albino man. Four of the children have normal pigmentation and one child is an

albino. The woman's genotype must be Aa.

  1. Genetic pleiotropy refers to the way the action of one gene affects several

 

different traits.

  1. How do the basic principles of inheritance, identified by Mendel in plants, differ from those in humans?

 

  1. Two people (BOTH heterozygotes) are able to taste a chemical substance called PTC. The ability to taste PTC is caused by a dominant allele (T). The inability to taste PTC is caused by a recessive allele (t). What proportion of their children would be expected NOT to be able to

taste PTC?

  1. Which statement(s) concerning polygenic traits is/are FALSE?

 

 

  1. A person with blood type B is heterozygous. What is that person’s

genotype?

  1. All human genetic disorders are inherited as recessive traits.
  2. Adaptation refers to changes in relation to the environment, selection

pressures, and allele frequencies.

20. A woman with normal skin pigmentation has five children with an albino

man. Four of the children have normal pigmentation and one child is an albino. The woman's genotype must be Aa.

21. Recessive conditions are usually associated with the lack of production of

an enzyme.

22. A man who has type A blood has the AA genotype. His wife, with type B blood, has the BO genotype. Which of the following blood types is/are

NOT possible for their children?

  1. Polygenic traits:
  2. The only source(s) of new genetic variation in any population is/are:
  3. When an allele is NOT expressed in heterozygotes, but is only expressed

in homozygotes, it is said to be:

  1. Researchers have identified six different modes of Mendelian inheritance.

.

27. A woman has the genotype XCXc and a man has the genotype XcY. They have a 50% chance of having a male child who has normal color vision.

.

  1. Adaptation refers to changes in relation to the environment, selection

pressures, and allele frequencies.

  1. Mendel’s first principle of inheritance is the principle of segregation.
  2. Dominance and recessiveness are all-or-nothing situations because the recessive allele has NO phenotypic effects in heterozygotes.

 

 

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