Table of Contents
What does the genotype code for?
Genotype refers to all the genes that an individual carries. Phenotype is the term for all the observable characteristics for which the genes code. In other words, the genotype refers to the genetic information, while the phenotype refers to the observable characteristics, including traits.
What are these genotypes?
A genotype is an individual’s collection of genes. The term also can refer to the two alleles inherited for a particular gene. The genotype is expressed when the information encoded in the genes’ DNA is used to make protein and RNA molecules.
When two of the same allele are inherited the genotype is called ___?
An individual’s genotype for that gene is the set of alleles it happens to possess. An organism in which the two copies of the gene are identical — that is, have the same allele — is called homozygous for that gene. An organism which has two different alleles of the gene is called heterozygous.
What does genotype AA mean?
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 the genotype of the male?
XY
Male Genotype When a sperm carrying the Y chromosome fertilizes an egg, the resulting embryo has a genotype of XY and will be a male. With rare exceptions, all other embryos will be XX or female. Although the Y chromosome codes for a male, the X chromosome is vital for normal human development.
What is the genotype of a person is heterozygous A?
An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. In our example, this genotype is written Bb.
How will you describe this genotype AA?
What is the genotype of O+ blood group?
OO
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 |
Is it always possible to determine the genotypes of all individuals?
It is not always possible to determine the genotypes of all of the individuals. In this example, the two girls in the third generation could have a heterozygous, Ff, genotype or they could have a homozygous dominant, FF, genotype, depending on what genes they received from their parents.
How do you find the genotype of a recessive trait?
Locate the recessive individuals in the pedigree, and assign their genotype – two lower case alleles (ff). All of the individuals with the dominant trait will have one capital letter, which expresses the trait. You can assign their genotype temporarily as capital letter, question mark to represent their alleles…
What is the genotype of the shaded individual?
Any shaded individual would have the genotype ff. All of the non-shaded individuals must have at least one dom inant allele, F, because they are not affected with this recessive disorder. The other allele is unknown at this time. By examining the parents or offspring, we can det ermine some, but not always all, of the genotypes of the individuals.
What is the genotype of the two girls in the third generation?
In this example, the two girls in the third generation could have a heterozygous, Ff, genotype or they could have a homozygous dominant, FF, genotype, depending on what genes they received from their parents. It is also impossible to tell from the information given what the genotype of the father in the first generation is.