Question

Explaining Simple Dominance Joe and Angie Summers would like to know how their daughter Jane has PKU when her brother Josh does not. They do not understand how neither of them could have PKU and then have a daughter who does. Your task is to help Joe and Angie understand how this has happened. Write a letter to Joe and Angie Summers explaining how the PKU trait was passed down to their daughter, Jane. Use our model to support your claims Your role: Genetics Counselor Audience: Joe and Angie Summers Format: A formal letter​

Answer 1

\Simple Dominance is a genetic pattern where one heterozygous individual can express the dominant phenotype.

What is simple dominance?

In genetics, the expression 'simple dominance' makes reference to the phenomenon where heterozygous individuals present a phenotype associated with a dominant allele.

In this case, incomplete dominance can be used to understand how PKU could be inherited from parents that do not exhibit the phenotype.

Autosomal recessive diseases are caused by the presence of a recessive allele in homo-zygous individuals.

In conclusion, simple dominance is a genetic pattern where one heterozygous individual can express the dominant phenotype.

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Answer 2

Simple Dominance is a genetic pattern where one heterozygous individual can express the dominant phenotype.

What does dominance mean?

The term "simple dominance" in genetics refers to the situation where heterozygous people exhibit a trait linked to a dominant allele.

In this instance, partial dominance might be used to explain how PKU might be inherited from parents who do not have the phenotype.

When an individual is homozygous, autosomal recessive disorders are brought on by the presence of the recessive allele.

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