Punnett Squares

Front

What does it mean to be heterozygous?

Back

Having two DIFFERENT alleles for a trait.

Front

What is a dominant trait?

Back

The trait that overshadows and is expressed.

Front

What is the genotype for a recessive trait represented as?

Back

tt

Front

What does it mean to be homozygous?

Back

Having two of the SAME alleles for a trait.

Front

In a heterozygous genotype, which allele takes over in the phenotype?

Back

The dominant allele.

Front

What is an allele?

Back

A variant form of a gene.

Front

What is a phenotype?

Back

The observable characteristics or traits of an organism.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by alleles.

Front

What is the purpose of a Punnett Square?

Back

To predict the possible genotypes and phenotypes of offspring from a genetic cross.

Front

What does it mean if an organism is homozygous dominant?

Back

It has two dominant alleles for a trait (e.g., AA).