Review: Genetics and Monohybrid crosses

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene.

Front

What is the genotype of a green pea plant (Gg) crossed with a yellow pea plant (gg)?

Back

The offspring will have 50% heterozygous (Gg) and 50% homozygous recessive (gg) genotypes.

Front

What are genotypes?

Back

Genotypes are the genetic makeup of an organism, represented by the combination of alleles (e.g., Aa, BB, bb).

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles (e.g., AA or aa), while heterozygous means having two different alleles (e.g., Aa).

Front

In a Punnett square, what does 'tt' represent?

Back

'tt' represents a homozygous recessive genotype for a trait.

Front

What is a Punnett square used for?

Back

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

Front

What does the capital letter in a genotype signify?

Back

The capital letter represents a dominant allele.

Front

What is the phenotype of a plant with genotype 'Tt'?

Back

The phenotype is tall, as 'T' (tall) is dominant over 't' (short).

Front

If a plant is homozygous dominant, what would its genotype look like?

Back

The genotype would be represented as 'AA'.

Front

What is the expected phenotype ratio from a monohybrid cross?

Back

The expected phenotype ratio is typically 3:1 for dominant to recessive traits.