An organism with the genotype DD for a trait is ..... Select all that apply.

GENETIC BASIS OF INHERITANCE

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

An organism with the genotype DD for a trait is ____ Select all that apply.

A	dominant
B	recessive
C	homozygous
D	heterozygous

Explanation:

Detailed explanation-1: -Answer. Sally’s genotype is “dd", so she is also considered homozygous. Susan’s genotype is “Dd", so she is considered HETEROZYGOUS (has two different alleles for a specific gene).

Detailed explanation-2: -Individuals who are homozygous dominant (DD) or heterozygous (Dd) are Rh+. Those who are homozygous recessive (dd) are Rh-(i.e., they do not have the key Rh antigens). Clinically, the Rh factor, like ABO factors, can lead to serious medical complications.

Detailed explanation-3: -Background: The DD genotype gene is a linkage marker for an etiologic mutation at or near the angiotensin-converting enzyme gene and has been associated with increased risk for the development of coronary artery disease, left ventricular hypertrophy and left ventricular dilation after myocardial infarction.

Detailed explanation-4: -(HOH-moh-ZY-gus JEE-noh-tipe) The presence of two identical alleles at a particular gene locus. A homozygous genotype may include two normal alleles or two alleles that have the same variant.

Detailed explanation-5: -So, the correct answer is ‘TT and tt’.

There is 1 question to complete.

NEET BIOLOGY

GENETICS AND EVOLUTION

GENETIC BASIS OF INHERITANCE