Genetics Vocab. and Simple Dominance Punnett Squares

Front

What is the definition of genotype?

Back

The genotype is the genetic makeup of an organism, representing the alleles inherited from its parents.

Front

What is the definition of phenotype?

Back

The phenotype is the physical appearance or observable traits of an organism, resulting from the interaction of its genotype with the environment.

Front

What does homozygous mean?

Back

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

Front

What does heterozygous mean?

Back

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

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

If a parent has the genotype AA and the other has aa, what are the possible genotypes of the offspring?

Back

All offspring will have the genotype Aa.

Front

What is the probability of obtaining a homozygous dominant offspring from a cross between Aa and Aa?

Back

The probability is 25%.

Front

What is the probability of obtaining a heterozygous offspring from a cross between Aa and Aa?

Back

The probability is 50%.

Front

What is the chance that an offspring from a cross between AA and Aa will be homozygous dominant?

Back

The chance is 50%.

Front

What is the definition of dominant allele?

Back

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