Punnett Squares

Front

What is a Punnett Square?

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.

Front

What does the term 'genotype' refer to?

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it possesses for a particular trait.

Front

What is the difference between homozygous and heterozygous genotypes?

Back

Homozygous genotypes have two identical alleles for a trait (e.g., RR or rr), while heterozygous genotypes have two different alleles (e.g., Rr).

Front

What is a phenotype?

Back

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

Front

What does it mean if an allele is dominant?

Back

A dominant allele is one that expresses its trait in the phenotype even when only one copy is present (e.g., R in Rr).

Front

What does it mean if an allele is recessive?

Back

A recessive allele only expresses its trait in the phenotype when two copies are present (e.g., rr).

Front

How do you represent dominant and recessive alleles in genetics?

Back

Dominant alleles are typically represented by uppercase letters (e.g., T), while recessive alleles are represented by lowercase letters (e.g., t).

Front

What is the genotype of a white-flowering plant in a species where red (R) is dominant over white (r)?

Back

The genotype of a white-flowering plant is rr.

Front

What is the genotype of a plant that is heterozygous for a trait?

Back

The genotype of a heterozygous plant is Rr.

Front

What does the term 'hybrid' mean in genetics?

Back

A hybrid refers to an organism with a heterozygous genotype, having two different alleles for a trait (e.g., Rr).