What are the similarities and differences between genotype and phenotype?

What are the similarities and differences between genotype and phenotype?

A genotype refers to the genetic characteristics of an organism. A phenotype refers to the physical characteristics. For example, having blue eyes (an autosomal recessive trait) is a phenotype; lacking the gene for brown eyes is a genotype.

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.

What kind of genotype is PP?

There are three available genotypes, PP (homozygous dominant ), Pp (heterozygous), and pp (homozygous recessive). All three have different genotypes but the first two have the same phenotype (purple) as distinct from the third (white).

What is genotype nn?

For example, the genotype for our long necked dragon could be either NN or Nn; the phenotype for this trait would be a long neck. For example, “NN” and “Nn” both cause the dragon’s neck to be long. Only in the case of “nn” would the dragon’s neck be short because no dominant allele for a long neck is present.

What are the letters for heterozygous?

Sometimes the term “PURE” is used instead of homozygous. When the GENOTYPE is made up of one capital letter & one lowercase letter (ex: Tt) it’s called HETEROZYGOUS (“hetero” means “other”).

Why do genotypes have 2 letters?

Some scientists use letters with superscripts and subscripts to represent the genotype and phenotype of a trait, respectively. These letters tend to relate to the trait in question, such as the letter B to represent brown eye color as a dominant allele.

What is it called when two alleles have capital letters?

Homozygous. both alleles of the pair are alike, or the or the same. Organism may be dominant ( both capital letters) or recessive (both lowercase letters). Example; PP or pp. Heterozygous.

How is a dominant allele written?

When expressing dominant and recessive alleles, the dominant allele is always written as a capitalized letter, and the recessive allele as the same letter, but lower case.

What type of letter represents a recessive allele?

lowercase letter

What traits are dominant and which are recessive?

The traits due to dominant alleles are always observed, even when a recessive allele is present. Traits due to recessive alleles are only observed when two recessive alleles are present. For example, the allele for widow’s peak is dominant and the allele for straight hairline is recessive.

How do I know if my genes are dominant or recessive?

For example, if a trait tends to be directly passed from parent to child, then the odds are pretty good that the trait is a dominant one. If a trait skips generations or pops up out of nowhere, then the odds are pretty good that it is recessive.