What is a homozygous recessive genotype example?


What is a homozygous recessive give two examples?

People who have recessive traits, like blue eyes or red hair, are always homozygous for that gene. The recessive allele is expressed because there isn’t a dominant one to mask it.

What is an example of a recessive genotype?

Only individuals with an aa genotype will express a recessive trait; therefore, offspring must receive one recessive allele from each parent to exhibit a recessive trait. One example of a recessive inherited trait is a smooth chin, as opposed to a dominant cleft chin. … Only (ss) individuals will express a smooth chin.

Is DD homozygous recessive?

He is HOMOZYGOUS (has 2 identical alleles for that gene) for the dimples gene. Sally’s genotype is “dd”, so she is also considered homozygous. … The little “d” allele is RECESSIVE as the allele will not be expressed unless there are two copies present.

What is a homozygous genotype?

(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.

What is an example of a heterozygous genotype?

Heterozygous means that an organism has two different alleles of a gene. For example, pea plants can have red flowers and either be homozygous dominant (red-red), or heterozygous (red-white). If they have white flowers, then they are homozygous recessive (white-white). Carriers are always heterozygous.

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What is an example of homozygous dominant?

A homozygous dominant genotype is one in which both alleles are dominant. For example, in pea plants, height is governed by a single gene with two alleles, in which the tall allele (T) is dominant and the short allele (t) is recessive.

What is heterozygous recessive example?

One such example is brown eyes (which is dominant) and blue eyes (which is recessive). If the alleles are heterozygous, the dominant allele would express itself over the recessive allele, resulting in brown eyes.

Is CC homozygous recessive?

All of the above results have involved comparisons of the heterozygote (Cc) with the homozygous recessive genotype (cc).

Is the genotype BB heterozygous or homozygous?

An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB. An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. In our example, this genotype is written Bb.