Form: Dihybrids, Incomplete, Codominance, Blood Types 12.3& 12.4

Front

What is a dihybrid cross?

Back

A genetic cross that involves two traits, each represented by two alleles.

Front

Define incomplete dominance.

Back

A type of inheritance where the phenotype of heterozygotes is intermediate between the phenotypes of the two homozygotes.

Front

What is co-dominance?

Back

A genetic scenario where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive.

Front

What blood type is represented by A antigens?

Back

Blood type A.

Front

What is the probability of obtaining a tall and white offspring in a dihybrid cross?

Back

The probability is represented by the ratio of the desired phenotype in the offspring.

Front

What does the term 'allele' mean?

Back

An allele is a variant form of a gene that can produce different traits.

Front

Explain Mendelian inheritance.

Back

A set of primary principles relating to the transmission of hereditary characteristics from parent organisms to their offspring.

Front

What is the significance of blood type AB?

Back

Individuals with blood type AB have both A and B antigens on their red blood cells and can receive blood from any type.

Front

What does homozygous mean?

Back

An organism is homozygous for a trait when it has two identical alleles for that trait.

Front

What is the phenotype?

Back

The observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.