GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An individual is heterozygous for a dominant recessive genetic disorder.
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An individual is homozygous for a recessive genetic disorder.
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An individual is heterozygous for a recessive genetic disorder.
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An individual is homozygous for a dominant genetic disorder.
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Detailed explanation-1: -Recessive inheritance means both genes in a pair must be abnormal to cause disease. People with only one defective gene in the pair are called carriers. These people are most often not affected with the condition. However, they can pass the abnormal gene to their children.
Detailed explanation-2: -The parents of a child with an autosomal recessive condition usually do not have the condition. Unaffected parents are called carriers because they each carry one copy of the mutated gene and can pass it to their children.
Detailed explanation-3: -Autosomal Recessive Inheritance Each parent of an affected patient is typically a heterozygous carrier, and has one normal and one abnormal copy of the gene (Figure 3.1B).
Detailed explanation-4: -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. GENETIC DISORDERS. Almost all diseases have a genetic component.
Detailed explanation-5: -Answer and Explanation: Heterozygous individuals are often called carriers of a trait because they have one dominant allele and one recessive allele that is hidden, so they carry it without it showing up. Alleles are the two forms of a gene that we inherit from our parents, one from each parent.