M4 Flashcards
(20 cards)
Law: Some alleles are dominant over other alleles for a given gene.
Law of Dominance
Law: Two alleles segregate randomly during formation of gametes.
Principle of Segregation
Law: Two genes will assort independently and randomly from each other.
Independent Assortment
An alternative form of a gene.
Allele
What is the allele that occurs most frequently in a population?
Wild-type Allele
Changes to this allele (wild-type allele) is termed as?
Mutation
The phenotype of the heterozygous is intermediate between two homozygotes.
Incomplete Dominance
It is also known as ________ because neither allele in a pair is fully expressed.
Blending
Two nonidentical alleles of a pair express two different phenotypes in the heterozygote.
Codominance
Who discovered codominance?
Karl Landsteiner & Philip Levin
An individual may have more than one pair of alleles.
Multiple Alleles
Blood groups are controlled by how many alleles?
Three Alleles
If a certain genotype causes death.
Lethal Genotypes/Genes
An organism dies if it has two lethal copies of the allele.
Homozygous Lethal Allele
It is usually stillbirth or miscarriage.
Lethal Genotypes/Genes
An organism dies if it has one copy of the allele (Huntington).
Heterozygous Lethal Allele
The expression of one gene pair masks or modifies the effect of another.
Epistasis
Interaction of two or more gene pairs at different loci influence the same trait, but one allele has an overriding effect on the phenotype.
Epistasis
The phenotype gets altered by epistatic gene.
Hypostatic Gene
Homozygous presence of an allele may prevent or override the expression of other alleles at a second locus.
Epistatic Gene
