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## What is the percentage of heterozygous individuals in the population?

Since p = 1 – 0.3, then p must equal 0.7. 2pq = 2 (0.7 x 0.3) = 0.42 = 42% of the population are heterozygotes (carriers).

## How many individuals would you expect to be homozygous dominant and heterozygous for this?

How many individuals would you expect to be homozygous dominant and heterozygous for the trait? q2 = 0.25 homozygous dominant = p2 heterozygous = 2pq q = 0.5 = 0.52 = 2(0.5)(0.5) p = 0.5 = 0.25 = 0.5 0.25(500) = 125 individuals 0.5(500 ) = 250 ind. 3.

21%

## How do you know if you are homozygous or heterozygous?

Because an organism has two sets of chromosomes, it usually only has two options to choose from when determining phenotype. If an organism has identical genes on both chromosomes, it is said to be homozygous. If the organism has two different alleles of the gene it is said to be heterozygous.

## What is an example of 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. For example, pea plants can have red flowers and either be homozygous dominant (red-red), or heterozygous (red-white).

## What are some examples of a 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.

## 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.

## Are green eyes homozygous recessive?

Due to the number of genes involved in eye color, the inheritance pattern is complex. The allele for brown eyes is the most dominant allele and is always dominant over the other two alleles and the allele for green eyes is always dominant over the allele for blue eyes, which is always recessive.

## Is TT homozygous dominant?

An organism can be either homozygous dominant (TT) or homozygous recessive (tt). If an organism has two different alleles (Tt) for a certain gene, it is known as heterozygous (hetero means different).

## Is nn homozygous dominant?

TT, Tt, YY, Hh, Ll, Pp, PP, MM, Nn, Rr, Qq, QQ, qq, mm, tt. Homozygous genotypes have either all dominant alleles (all capital letters) or all recessive alleles (all lowercase letters). They are represented by one capital and one lowercase letter. Tt, Hh, Ll, Pp, Nn, Rr, Qq.

## How do you tell if a gene is recessive or dominant?

If both parents do not have the trait and the child does, it is recessive. If one parent has the trait and the child does or does not, it is dominant.

## Are dominant characteristics always more frequent than recessive ones in a population?

Dominant traits are more frequent than the recessive ones. As the dominant gene mask or prevents the expression of the recessive gene.

## Is it possible to determine the genotype of an individual with a dominant phenotype?

Bottom line is you can’t always figure out genotype from phenotype with a dominant trait because dominant traits can happen with two different genotypes.

2021-05-14