Suppose the Ancestral Nucleotide at Position 786 Is A, and the Same

question 56

Short Answer

Suppose the ancestral nucleotide at position 786 is A, and the same substitution from A to G occurs in both descendant lineages. This substitution would be called a _______ substitution.

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Definitions:

Huntington Disease

A hereditary neurodegenerative disease characterized by motor dysfunction, cognitive decline, and psychiatric issues.

Twenty-First Chromosome

One of the 23 pairs of chromosomes in humans, with an abnormality in this chromosome causing Down syndrome.

Down Syndrome

A genetic disorder caused by the presence of all or part of a third copy of chromosome 21, associated with physical growth delays, characteristic facial features, and mild to moderate intellectual disability.

Homozygous

Having two identical alleles for a trait.