Practice Flashcard-Mendelian Genetics

Front

What is a recessive trait?

Back

A recessive trait is a genetic characteristic that is expressed only when two recessive alleles are present. In humans, blue eyes are an example of a recessive trait.

Front

What genotype would a blue-eyed child have?

Back

bb

Front

What is a heterozygous individual?

Back

A heterozygous individual has two different alleles for a specific gene, represented as 'Hh'.

Front

What is the genotype of a heterozygous yellow pea plant if yellow is dominant?

Back

Yy

Front

What is the expected percentage of heterozygous dominant offspring from a monohybrid cross?

Back

50%.

Front

What is the expected percentage of purebred dominant offspring from a monohybrid cross?

Back

25%.

Front

What does the term 'genotype' refer to?

Back

Genotype refers to the genetic makeup of an individual, specifically the alleles present for a particular gene.

Front

What does the term 'phenotype' refer to?

Back

Phenotype refers to the observable characteristics or traits of an individual, which result from the interaction of genotype and environment.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous individuals have two identical alleles for a gene (e.g., 'HH' or 'hh'), while heterozygous individuals have two different alleles (e.g., 'Hh').

Front

What is a Punnett square used for?

Back

A Punnett square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.