What are the rules in writing the genotype?

How do you determine a genotype?

Certain combinations of DNA nucleotides will create different genotypes, or pairs of traits. The traits represented in a genotype can be dominant or recessive, and will determine how that feature is expressed by the organism. To determine a genotype, you can use a Punnett square.

What are the 3 basic genotypes?

Genotype is also used to refer to the pair of alleles present at a single locus. With alleles ‘A’ and ‘a’ there are three possible genotypes AA, Aa and aa.

What is AA in genotype?

The term “homozygous” is used to describe the pairs “AA” and “aa” because the alleles in the pair are the same, i.e. both dominant or both recessive. In contrast, the term “heterozygous” is used to describe the allelic pair, “Aa”.

What is a genotype example?

Genotype examples

A gene encodes eye color. In this example, the allele is either brown, or blue, with one inherited from the mother, and the other inherited from the father. The brown allele is dominant (B), and the blue allele is recessive (b).

How many genotypes are there?

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.

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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.

What is the genotype of O+ blood group?

This is because the dominant A allele will overshadow the recessive O allele. However, if someone were to have the genotype AB, they would have blood type AB because both the A and B alleles are dominant.

Genotypes.

Blood Type Genotype
Blood Type B Genotypes BB or BO
Blood Type AB Genotype AB
Blood Type O Genotype OO

Which blood group is the best?

Type O negative red blood cells are considered the safest to give to anyone in a life-threatening emergency or when there’s a limited supply of the exact matching blood type. That’s because type O negative blood cells don’t have antibodies to A, B or Rh antigens.