The principle of dominance is a genetic law that states that the offspring of individuals with contrasting traits will only express the dominant trait. The discovery was made by Gregor Mendel and thus, the law is also called "Mendel's Law."Continue Reading
Mendel observed that while only the dominant trait showed in the second generation offspring, the invisible, or recessive trait, reappeared in the third generation. However, Mendel only observed one type of dominance, now called complete dominance. There are several other kinds of dominance, including incomplete dominance, codominance and pseudodominance.
Other phenomena also impact gene expression. These factors include variable penetrance, variable expressivity, and epistasis.Learn more about Molecular Biology & DNA
A homozygote is an individual organism with two copies of the same allele that determines a specific trait, while a heterozygote has a copy of two different alleles for the same trait. Alleles are alternative forms of genes that determine the same trait.Full Answer >
A multiple allele trait is one of at least three different types of a specific gene, but only two of these types are able to exist in a diploid. A diploid is a type of organism or cell that has two sets of chromosomes, with one set typically from the father and the other from the mother.Full Answer >
The father does not carry the gene for non-identical twins, as releasing more than one egg at a time is a trait that runs in the maternal line. There is no evidence suggesting that identical twins run in families. Women who experience a multiple pregnancy are at higher risk of certain complications.Full Answer >
Rh factor is an inherited trait that does not affect health but sometimes affects pregnancies of Rh-negative mothers carrying Rh-positive babies, states Mayo Clinic. Rh factor is a protein located on the red blood cells. Individuals with the protein are Rh positive; those without it are Rh negative.Full Answer >