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1. An individual is heterozygous for 2 genes.

Question # 00590028
Subject: Biology
Due on: 09/16/2017
Posted On: 09/16/2017 12:07 PM

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1. An individual is heterozygous for 2 genes.

How many different types of gametes can this person produce & in what proportions?


2. Brown eyes (B) are fully dominant over blue eyes (b).

a. A 3:1 phenotypic ratio of F1 progeny indicates that the parents are of what genotype?

b. A 1:1 phenotypic ratio of F1 progeny indicates that the parents are of what genotype?


3. Sickle cell anemia (SCA) is an autosomal recessive genetic condition. A couple plans to marry & wants to know the probability that they will have a child affected by SCA. With your knowledge of Mendelian inheritance, what can you tell this couple if:

a. both are unaffected, but each has one affected parent & one unaffected, not a carrier parent.

b. the man is affected & the woman is unaffected & both her parents are unaffected, not carriers.


4. A man with blood A and a woman with blood type B have 3 children:

a daughter with blood AB

a son with blood type B

another son with blood type O

What are the genotypes of the parents?


Tags genes heterozygous individual blood parents affected woman eyes unaffected type couple plans probability wants marry child know inheritance children genotypes carriers tell mendelian condition knowledge receive brown fully dominant blue proportions produce types

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