# How many possible genotypes are there and why?

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A description of the pair of alleles in our DNA is called the genotype. Since there are three different alleles, there are a total of six different genotypes at the human ABO genetic locus. The different possible genotypes are AA, AO, BB, BO, AB, and OO. How are blood types related to the six genotypes?

## Can there be 4 genotypes?

If you are given a male with a yellow body and red eyes, how can you determine its genotype? In this example, there are now four possible genotypes that are associated with the dominant phenotype of yellow body/red eyes. These four genotypes can produce one, two, two, and four different gametes, respectively (Table 3).

## How do you find the possible genotypes?

A Punnett square is one of the simplest ways to determine genotype. The square is actually a mini-chart used to determine the potential genotype for an offspring with respect to particular trait.

## How many genotypes are possible?

A description of the pair of alleles in our DNA is called the genotype. Since there are three different alleles, there are a total of six different genotypes at the human ABO genetic locus. The different possible genotypes are AA, AO, BB, BO, AB, and OO. How are blood types related to the six genotypes?

## How many genotypes are possible with 8 alleles?

Therefore, 8 alleles of a gene can have 36 possible genotypes in the population.

## How many genotypes are possible with 6 alleles?

Consider the case, though, of a locus with 6 alleles. It has 21 possible genotypes — 6 kinds of homozygotes and 15 kinds of heterozygotes. Writing it out, 6 + 5 + 4 + 3 + 2 + 1 = 21 = [6*(6+1)]/2 — this is the formula for combinations of six things taken two at a time, order unimportant — [n(n+1)] / 2.

## How many phenotypes are possible?

A fetus receives one of these three alleles from each of its parents. This produces four possible phenotypes (blood types) and six possible genotypes.

## How many genotypes are possible with 4 alleles?

4 alleles there are 1 + 2 + 3 + 4 = 10 genotypes.

## How many genotypes are possible in a Trihybrid cross?

There are 27 different genotypes possible in trihybrid cross, hence, its genotypic ratio is not mentioned.

## How many genotypes are possible with 3 alleles in diploid population?

It has three alleles – IA,IB and i. Since there are three different alleles, six different genotypes are possible.