A homozygous genotype is one in which both alleles are the same, and an organism with a homozygous genotype is said to be true-breeding or purebred. A homozygous dominant genotype is one in which both alleles are dominant.
Is purebred homozygous dominant or recessive?
Dominant and recessive alleles can be used to explain Mendel’s observations. An organism that has two identical (same) alleles for a trait is called a purebred. purebred in the U.S. two recessive (tt).
Can you be homozygous dominant?
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. Heterozygous means that an organism has two different alleles of a gene. … People with CF are homozygous recessive.
What is an example of homozygous purebred?
Explanation: For example, in common life, let’s say a horse is a purebred quarter. That means it is homozygous for all traits that quarter horses should have.
What is an example of a purebred genotype?
Hint: BB, hh, ZZ, and jj are all examples of purebred genotypes.
Is hybrid homozygous or heterozygous?
Homozygous traits are either a combination of the same two dominant alleles or the same two recessive alleles. A hybrid trait is also known as a heterozygous trait, and is the pairing of a dominant and recessive allele.
Are humans heterozygous or homozygous?
Humans have two sets of chromosomes. Homozygous and heterozygous are terms that are used to describe allele pairs. Individuals carrying two identical alleles (RR or rr) are known as homozygous.
Homozygous vs Heterozygous.
|Only one type of gamete is produced||Two types of gametes are produced|
Is BB 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.
Is AA homozygous dominant?
Homozygous means that both copies of a gene or locus match while heterozygous means that the copies do not match. Two dominant alleles (AA) or two recessive alleles (aa) are homozygous. One dominant allele and one recessive allele (Aa) is heterozygous.
Does true breeding mean homozygous?
A true breeding is a kind of breeding wherein the parents would produce offspring that would carry the same phenotype. This means that the parents are homozygous for every trait. … For this to occur the parents are homozygous for a trait — which means the parents must be both dominant or both recessive.
What are examples of homozygous?
- 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.