What is the difference between a homozygous and a heterozygous trait How are they related to dominant and recessive traits?

The difference between these traits is: Homozygous traits have two copies of the same allele. Heterozygous traits have one dominant allele and one recessive allele.

What are the similarities and differences between homozygous and heterozygous alleles?

Summary

Homozygous Heterozygous
When two identical alleles are present. When two different alleles are present.
Both are either dominant or both are either recessive. Both alleles are different, one is dominant and one is recessive.
Produce a single type of gametes Produce two different types of gametes.

How does a heterozygous organisms differ from a homozygous organism in terms of the alleles they contribute to the population?

Each pair of alleles represents the genotype of a specific gene. Genotypes are described as homozygous if there are two identical alleles at a particular locus and as heterozygous if the two alleles differ. Alleles contribute to the organism’s phenotype, which is the outward appearance of the organism.

Are humans homozygous or heterozygous?

Since humans possess two copies of each chromosome, they also have two copies of each gene and locus on those chromosomes. Each of these trait-encoding genes (or loci) is called an allele. … If the alleles are different, the person is heterozygous for that trait.

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What does homozygous and heterozygous have in common?

Homozygous means that the organism has two copies of the same allele for a gene. … 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).

What is an example of heterozygous?

If the two versions are different, you have a heterozygous genotype for that gene. For example, being heterozygous for hair color could mean you have one allele for red hair and one allele for brown hair. The relationship between the two alleles affects which traits are expressed.

What are examples of homozygous?

Homozygous examples

  • Eye color. The brown eye color allele is dominant over the blue eye allele. You can have brown eyes whether you’re homozygous (two alleles for brown eyes) or heterozygous (one for brown and one for blue). …
  • Freckles. Freckles are tiny brown spots on the skin. …
  • Hair color. Red hair is a recessive trait.

Which trait is heterozygous 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.

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