10.2 Genetics & Punnett Squares

Front

What is the physical appearance of a trait called?

Back

Phenotype

Front

What are Aa, DD, bB, and yy examples of?

Back

Genotypes

Front

What allele combination should go in the missing box?

Back

Aa

Front

If brown eyes are dominant over blue eyes, what are the parent genotypes if two heterozygous brown-eyed persons are crossed?

Back

Bb and Bb

Front

In plants, if tall (T) is dominant to short (t), what is the probability of producing a short plant from a Tt x Tt cross?

Back

25%.

Front

Define genotype.

Back

The genetic makeup of an organism, represented by alleles (e.g., AA, Aa, aa).

Front

Define phenotype.

Back

The observable characteristics or traits of an organism, determined by its genotype and environment.

Front

What does homozygous mean?

Back

Having two identical alleles for a particular gene (e.g., AA or aa).

Front

What does heterozygous mean?

Back

Having two different alleles for a particular gene (e.g., Aa).

Front

What is a Punnett square used for?

Back

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