Genetics Practice

Front

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

Back

dominant

Front

Which of the following genotypes is heterozygous? (Options: Bb, BB, bb)

Back

Bb

Front

Two brown eyed parents (Bb) have a baby. What is the chance their baby is blue eyed? (Options: 0 %, 25%, 50%, 75%)

Back

25%

Front

A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers? (Options: 0%, 25%, 50%, 100%)

Back

100%

Front

This is an example of --- (Options: Incomplete dominance, Codominance)

Back

Codominance

Front

Define 'allele'.

Back

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

Front

What is a genotype?

Back

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

Front

What is a phenotype?

Back

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

Front

Explain incomplete dominance.

Back

Incomplete dominance is a genetic situation where one allele does not completely dominate another, resulting in a blended phenotype.

Front

Explain codominance.

Back

Codominance is a genetic situation where both alleles in a heterozygous genotype are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive.