Question

Tay-Sachs disease is caused by recessive alleles on an autosome. In which case(s) could two parents with a normal phenotype have a child with Tay-Sachs? a. Both parents are homozygous for a Tay-Sachs allele. b. Both parents are heterozygous for a Tay-Sachs allele. C. One parent is homozygous for a Tay-Sachs allele, and the other is heterozygous.

Name: Problem 4, Chapter 14: Biology : The Unity and Diversity of Life
Uploaded: 2022-02-01T10:15:53-08:00
Duration: 46 s
Channel: Mishal Gul
Description: Tay-Sachs disease is caused by recessive alleles on an autosome. In which case(s) could two parents with a normal phenotype have a child with Tay-Sachs? a. Both parents are homozygous for a Tay-Sachs allele. b. Both parents are heterozygous for a Tay-Sachs allele. C. One parent is homozygous for a Tay-Sachs allele, and the other is heterozygous.

   Tay-Sachs disease is caused by recessive alleles on an autosome. In which case(s) could two parents with a normal phenotype have a child with Tay-Sachs?
a. Both parents are homozygous for a Tay-Sachs allele.
b. Both parents are heterozygous for a Tay-Sachs allele.
C. One parent is homozygous for a Tay-Sachs allele, and the other is heterozygous.

Biology : The Unity and Diversity of Life

Cecie Starr,… 15th Edition

Chapter 14, Problem 4

Instant Answer

Solved by Expert Mishal Gul

02/01/2022

Step 1

It is caused by recessive alleles on an autosome. This means that a person must inherit two copies of the defective gene, one from each parent, in order to develop the disease. Show more…

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Tay-Sachs disease is caused by recessive alleles on an autosome. In which case(s) could two parents with a normal phenotype have a child with Tay-Sachs? a. Both parents are homozygous for a Tay-Sachs allele. b. Both parents are heterozygous for a Tay-Sachs allele. C. One parent is homozygous for a Tay-Sachs allele, and the other is heterozygous.

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Key Concepts

Autosomal Recessive Inheritance

This concept describes the pattern in which two copies of a mutant allele (one from each parent) are required for the phenotype to be expressed. In autosomal recessive diseases, individuals with only one copy of the allele (carriers) typically have a normal phenotype, while those with two mutated copies exhibit the disorder.

Carrier Status

Carriers are individuals who possess one normal allele and one mutant allele for an autosomal recessive disease. Although carriers do not show clinical symptoms, they can pass the mutant allele to their offspring. When both parents are carriers, there is a chance of producing an affected child who inherits the mutant allele from both parents.

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