5. Barak has heterozyg widow\'s peak? no widow\'s peak. Michelle has a widow\'s

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5. Barak has heterozyg widow's peak? no widow's peak. Michelle has a widow's peak, but she is zygous for this trait. What are the chances of their daughter, Misha, has a eaver" Cleaver has no mid-digital hairs, but his father does. What is Mr. Cleaver's genotype for mid-digital hairs (only ONE answer)? 7. The allele for Huntington's disease is dominant. Woody Guthrie was heterozygous for this trait, and Mrs. Guthrie did not have Huntington's Chorea. What are the chances that their son Arlo will develop the symptoms? 8. What was Joan Barry's genotype for ABO blood type (only ONE answer)? (See the paragraphs on ABO blood types for hints on this question) 9. The allele for Tay-Sachs is a recessive allele that causes death in early childhood. The Tay-Sachs' program has enabled Tim McGraw to determine that he is a carrier (and that his wife, Faith Hill, is not). What are the chances they could have a child with Tay-Sachs? 10. Persons who are heterozygous for sickle cell anemia (SS') are said to have the sickle cell trait. Alleles S and S' are codominant. What are the chances that Sam and his wife Ethyl, who both have sickle cell trait, will have a child with sickle cell anemia (genotype S'S)? 11. Hillary has a well-developed hitchhiker's thumb, but neither of her parents shows the trait. What are the chances that they are both heterozygous for this allele? 93

Explanation / Answer

According to the Chegg guidelines I'll answer the first question when more than one question is posted. Post them separately to get the answers.

5) Widow's peak is an autosomal dominant trait.

Barack has no widow's peak. So, genotype is aa.

Mitchell has the disease but is heterozygous. So, genotype of Mitchell is Aa.

Cross of Barak and Mitchell is aa x Aa.

There can be two genotype possibilities for their daughter, either Aa or aa. Aa is diseased and aa is normal.

So, there are 50% chances of their daughter Misha to have widow's peak.

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