PATHOLOGY

Detailed explanation-1: -Genes are the only influence on traits. Amanda is not sick, but she is the carrier of a disease allele. What is another way to describe her condition?? Homozygous dominant for the disease gene.

Detailed explanation-2: -Carriers are always heterozygous. People with CF are homozygous recessive. Since Huntington’s disease is autosomal dominant, people with the disease can be either homozygous dominant or heterozygous.

Detailed explanation-3: -A person with one abnormal gene is called heterozygous for that gene. If a child receives an abnormal recessive disease gene from both parents, the child will show the disease and will be homozygous (or compound heterozygous) for that gene.

Detailed explanation-4: -An individual who carries one harmful allele for an autosomal recessive disorder is known as a carrier. And an organism is said to be heterozygous if it possesses two distinct alleles of a gene. Carriers are heterozygous because they have two alleles of a gene.

Detailed explanation-5: -Heterozygous refers to having different alleles for a particular trait. If the two versions are different, you have a heterozygous genotype for that gene. The relationship between the two alleles affects which traits are expressed.