Genetics Review

The genotype is the genetic makeup of an individual, represented by the alleles inherited from their parents.

Codominance is a type of inheritance where both alleles in a heterozygous individual are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive.

Homozygous genotypes have two identical alleles for a trait (e.g., HH or hh), while heterozygous genotypes have two different alleles (e.g., Hh).

An autosomal recessive disorder is a genetic condition that occurs when an individual inherits two recessive alleles for a trait, one from each parent.

There is a 25% probability that two heterozygous parents (Hh) will have a child with the disorder (hh).

X-linked traits are associated with genes located on the X chromosome, often affecting males more severely due to their single X chromosome.

Incomplete dominance is a form of inheritance where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

A pedigree chart is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and is used to track genetic traits through generations.

Alleles are different versions of a gene that determine specific traits, and individuals inherit one allele from each parent.

The expected blood types of the child could be A or B, but not AB or O.