Is DD heterozygous recessive or dominant?

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T Tt (tall) Tt (tall)

Is DD heterozygous recessive?

Heterozygous means an individual has the alleles for both the recessive and dominant traits, but only the dominant is expressed, so a heterozygous (Dd) and a homozygous dominant (DD) individual will not have the recessive disorder, because any dominant allele suppressed the expression of the recessive allele.

Is DD recessive or dominant?

Humans have two versions of all autosomal genes, called alleles, one from each parent. The recessive trait is hidden in the heterozygous individual (Dd) if the other allele is inherited in a dominant fashion, and so this person is a called a “carrier” of the recessive allele, but does not manifest the disease or trait.

What does DD mean in genotype?

Dd = tall (heterozygous)

Is homozygous dominant dd?

Physical Traits and Appearance

Having dimples on the cheeks is a dominant trait, with the homozygous DD gene causing them. However, the recessive trait is distinguished by the symbol dd; individuals with this homozygous gene will not have dimples.

Is DD recessive?

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). … The little “d” allele is RECESSIVE as the allele will not be expressed unless there are two copies present.

Is EE dominant or recessive?

There are special term that are used to indicate each of these genotypes. Homozygous dominant, means that the organism has two copies of the dominant allele, in this case EE. Combination A is an example. Heterozygous means that the organism has one dominant and one recessive allele: Ee.

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Which genotype is purebred?

Answer Key

Purebred – Also called HOMOZYGOUS and consists of gene pairs with genes that are the SAME. Hybrid – Also called HETEROZYGOUS and consists of gene pairs that are DIFFERENT. Genotype is the actual GENE makeup represented by LETTERS.

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