Table of Contents
- 1 What is the phenotype of a homozygous recessive?
- 2 What does homozygous recessive look like?
- 3 How would you describe the phenotype of a heterozygous A?
- 4 What does heterozygous look like?
- 5 What’s recessive phenotype?
- 6 What is the phenotype of a heterozygote?
- 7 What is the phenotypic ratio of homozygous and heterozygosus?
- 8 What are the phenotypes of both recessive and dominant traits?
What is the phenotype of a homozygous recessive?
The answer is yes, two different genotypes can result in the same phenotype. Remember, the recessive phenotype will be expressed only when the dominant allele is absent, or when an individual is homozygous recessive ( tt ) ( Figure below )….
| Genotype | Definition | Example |
|---|---|---|
| Homozygous recessive | Two recessive alleles | tt |
What does homozygous recessive look like?
Being homozygous for a particular gene means you inherited two identical versions. It’s the opposite of a heterozygous genotype, where the alleles are different. People who have recessive traits, like blue eyes or red hair, are always homozygous for that gene.
What does a recessive phenotype look like?
For example, if both genes code for blue eyes, the offspring will have blue eyes. If, however, the two genes carry different variations for the trait, the phenotype will be determined by the dominant gene. For example, the gene for brown eyes is dominant while the gene for blue eyes is recessive.
What would be the phenotype of a homozygous recessive YY pea plant?
YY is the homozygous dominant genotype (2 Y alleles). The phenotype of this genotype is yellow seed color. Yy is the heterozygous genotype (one dominant allele, one recessive allele). The phenotype of this genotype is green seed color.
How would you describe the phenotype of a heterozygous A?
A heterozygous individual is a diploid organism with two alleles, each of a different type. In alleles that show complete dominance, the heterozygous phenotype will be the same as the dominant phenotype. …
What does heterozygous look like?
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.
How would you describe the phenotype of a homozygous dominant A?
In-Depth Homozygous Definition A homozygous dominant allele combination contains two dominant alleles and expresses the dominant phenotype (expressed physical trait). A homozygous recessive allele combination contains two recessive alleles and expresses the recessive phenotype.
What phenotypes are recessive?
Recessive phenotypes are basically versions of certain phenotypes that are masked . You can inherit the alleles for them, but they are not expressed unless you have only that allele. Some examples of this would be the diseases Sickle-cell anemia and Cystic Fibrosis.
What’s recessive phenotype?
Definition. A phenotype that requires two copies of the causal variant in an individual to occur.
What is the phenotype of a heterozygote?
Heterozygous individuals have a phenotype somewhere in the middle, what people might call “wavy” hair. In a heterozygous individual, only one curly allele is present, and only half the amount of protein can be made. This causes the hair to be about as half as curly as in a homozygous curly individual.
Which is homozygous dominant or recessive for seed shape?
The (RR) genotype is homozygous dominant and the (rr) genotype is homozygous recessive for seed shape. In the image above, a monohybrid cross is performed between plants that are heterozygous for round seed shape. The predicted inheritance pattern of the offspring results in a 1:2:1 ratio of the genotype.
What happens if you are homozygous for a recessive allele?
If you were heterozygous for that mutated recessive allele, the normal dominant allele would take over. The disease may be expressed mildly or not at all. If you’re homozygous for the recessive mutated gene, you have a higher risk of the disease.
What is the phenotypic ratio of homozygous and heterozygosus?
The predicted inheritance pattern of the offspring results in a 1:2:1 ratio of the genotype. About 1/4 will be homozygous dominant for round seed shape (RR), 1/2 will be heterozygous for round seed shape (Rr), and 1/4 will have the homozygous recessive wrinkled seed shape (rr). The phenotypic ratio in this cross is 3:1.
What are the phenotypes of both recessive and dominant traits?
Phenotypes % Occurrence = both dominant traits = one dominant and one recessive trait (fur length) (fur color) = one recessive and one dominant trait (fur length) (fur color) = both recessive traits Write this on the side of your Punnett Square for the Dihybrid Cross