Mendelian Genetics and Punnett Squares

Front

What is the phenotype of an organism with the genotype BB?

Back

The phenotype is blue.

Front

What are recessive alleles represented by?

Back

Recessive alleles are represented by lowercase letters.

Front

If an organism is heterozygous, what is another term that describes it?

Back

Another term for heterozygous is hybrid.

Front

What term did Mendel use to describe the two kinds of traits from parents?

Back

Mendel called them alleles.

Front

What does a Punnett Square illustrate?

Back

A Punnett Square illustrates the possible genetic combinations from a cross between two organisms.

Front

What is the genotype of an organism with a dominant phenotype but unknown genotype?

Back

The genotype could be either homozygous dominant (BB) or heterozygous (Bb).

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup (e.g., BB, Bb, bb), while phenotype refers to the observable traits (e.g., blue or green color).

Front

What is a homozygous organism?

Back

A homozygous organism has two identical alleles for a trait (e.g., BB or bb).

Front

What is a hybrid organism?

Back

A hybrid organism has two different alleles for a trait (e.g., Bb).

Front

What does it mean if an allele is dominant?

Back

A dominant allele is one that expresses its trait even in the presence of a recessive allele.