Genetics

Front

What is the definition of a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present in the genotype.

Front

What is the definition of a recessive allele?

Back

A recessive allele is an allele that only expresses its trait when two copies are present in the genotype.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Aa).

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., AA or aa).

Front

What is a Punnett square used for?

Back

A Punnett square is a diagram used to predict the genotypes and phenotypes of offspring from a genetic cross.

Front

What is the expected phenotypic ratio of offspring from a monohybrid cross between two heterozygous parents?

Back

The expected phenotypic ratio is 3:1, where 3 offspring show the dominant trait and 1 shows the recessive trait.

Front

What is the expected genotypic ratio of offspring from a monohybrid cross between two heterozygous parents?

Back

The expected genotypic ratio is 1:2:1, representing one homozygous dominant, two heterozygous, and one homozygous recessive.

Front

What is the significance of the F1 generation in genetics?

Back

The F1 generation is the first generation of offspring produced from a cross of two parental (P) organisms.

Front

What is the significance of the F2 generation in genetics?

Back

The F2 generation is the second generation of offspring, produced by crossing two F1 individuals.

Front

What is the principle of segregation?

Back

The principle of segregation states that during the formation of gametes, the two alleles for a trait separate from each other.