Probability and Genetics Concepts

Front

What is a CARRIER genotype?

Back

A carrier genotype is one that has one dominant allele and one recessive allele, such as X^B X^b, which does not express the recessive trait but can pass it to offspring.

Front

What is the probability of having an AB blood type when the mother is type O and the father is type AB?

Back

0% - A type O parent can only pass on O alleles, so the offspring cannot have an AB blood type.

Front

What is a dominant trait?

Back

A dominant trait is a characteristic that is expressed when at least one copy of the dominant allele is present.

Front

What are heterozygous alleles?

Back

Heterozygous alleles are two different alleles for a particular gene, such as Ll.

Front

What is the genotype for a yellow plant if G = green and g = yellow?

Back

The genotype for a yellow plant is gg.

Front

Define genotype.

Back

Genotype is the genetic makeup of an organism, represented by the alleles it possesses.

Front

Define phenotype.

Back

Phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What is the difference between homozygous and heterozygous alleles?

Back

Homozygous alleles are two identical alleles for a trait (e.g., AA or aa), while heterozygous alleles are two different alleles (e.g., Aa).

Front

What is a recessive trait?

Back

A recessive trait is a characteristic that is expressed only when two copies of the recessive allele are present.

Front

What does it mean for an allele to be dominant?

Back

A dominant allele is one that can mask the effect of a recessive allele in a heterozygous genotype.