What is homozygous dominant and recessive?

What is a homozygous dominant?

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.

What is an example of homozygous dominant and homozygous recessive?

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 homozygous recessive?

Homozygous means that the organism has two copies of the same allele for a gene. An organism can be homozygous dominant, if it carries two copies of the same dominant allele, or homozygous recessive, if it carries two copies of the same recessive allele. … People with CF are homozygous recessive.

What is a recessive allele?

Definition. A type of allele that when present on its own will not affect the individual. Two copies of the allele need to be present for the phenotype to be expressed.

Is JJ dominant or recessive?

Another gentleman does not possess this gene – instead, he has the recessive jj gene which means his joints bend normally. A boy is born with an extra finger on each hand due to the dominant gene EE, while another newborn with the recessive homozygous ee gene has the normal number of fingers on her hands.

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Is FF a heterozygous genotype?

Genotype is the genetic makeup of an individual eg Ff or FF. Phenotype is the physical appearance eg carrier of cystic fibrosis.

Mendelian Genetics.

Genotype Phenotype
F F Homozygous dominant No cystic fibrosis (Normal)
F f Heterozygous Carrier (has no symptoms but carries the recessive allele)

What is the difference between a heterozygous and homozygous set of alleles?

The terms Homozygous and Heterozygous are used to describe allele pairs. A Homozygous individual carries a set of two identical (RR or rr) alleles while a Heterozygous individual bears different alleles (Rr).

What is the term heterozygous mean?

(HEH-teh-roh-ZY-gus JEE-noh-tipe) The presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles (compound heterozygote).