# How many different genotypes are possible in the population?

Contents

There are three common alleles in the ABO system. These alleles segregate and assort into six genotypes, as shown in Table 1. As Table 1 indicates, only four phenotypes result from the six possible ABO genotypes.

## How many different genotypes are possible?

With alleles ‘A’ and ‘a’ there are three possible genotypes AA, Aa and aa. With three alleles 1, 2, 3 there are six possible genotypes: 11, 12, 13, 22, 23, 33. First we must appreciate that genes do not act in isolation.

## How do you determine the number of possible genotypes?

Number of genotypes for a given number of alleles Given n alleles at a locus, the number genotypes possible is the sum of the integers between 1 and n: With 2 alleles, the number of genotypes is 1 + 2 = 3. 3 alleles there are 1 + 2 + 3 = 6 genotypes.

## How many different genotypes are possible from the cross?

Three different genotypes are possible to form a cross between the parents RR and rr. This cross between RR and rr is defined as a monohybrid cross. The heterozygous F1 offspring produces two types of gametes, which after selfing produce offspring which have a genotypic ratio of 1:2:1.

## Can there be 4 genotypes?

Things get slightly more complex when considering two genes. For instance, a wild-type fly (with red eyes and a yellow body) has one of four possible genotypes: EEBB, EEBb, EeBB, and EeBb.

## How many possible phenotypes are there?

There are three common alleles in the ABO system. These alleles segregate and assort into six genotypes, as shown in Table 1. As Table 1 indicates, only four phenotypes result from the six possible ABO genotypes.

## 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 8 alleles?

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

## How many phenotypes and genotypes are possible in f2 generation?

Phenotypes-4; Genotypes-9.

## How many different genotypes are possible from a cross between the parents RrYy and RrYy?

F2 generation- Self cross is done between RrYy. The number of RrYy heterozygous hybrids obtained are 4. Thus, the correct answer is option ‘A’.

## What are the differences between genotypes and phenotypes?

The genotype is a set of genes in the DNA which are responsible for the unique trait or characteristics. Whereas the phenotype is the physical appearance or characteristic of the organism. Thus, we can find the human genetic code with the help of their genotype.

## What would be number of possible genotypes in case of multiple alleles?

Although there are three alleles present in a population, each individual only gets two of the alleles from their parents. This produces the genotypes and phenotypes shown in the figure below. Notice that instead of three genotypes, there are six different genotypes when there are three alleles.

## What is the sickness of AA genotype?

Children with genotype AA (92.3%) were more susceptible to malaria parasite than AS (5.1%) and SS (2.6%). The association of haemoglobin genotype with malaria was highly significant (p<0.001).

## Can AA and SS marry?

AC is rare whereas AS and AC are abnormal. Compatible genotypes for marriage are: AA marries an AA. … And definitely, SS and SS must not marry since there’s absolutely no chance of escaping having a child with the sickle cell disease.

## Can As marry as?

However, AS and AS should not marry because there is every chance of having a child with Sickle Cell Disease, while AS and SS shouldn’t think of marrying. And definitely, SS and SS must not marry since there’s absolutely no chance of escaping having a child with the sickle cell disease.