8th Grade Genetics Check-in

Two identical alleles for a trait is known as

• homozygous

• hybrid

• heterozygous

• genotype

A physical appearance is

• Genotype

• Phenotype

• Heterozygous

• Homozygous

What is the probability of producing a tall pea plant from a cross between two hybrid tall pea plants?

• 25%

• 50%

• 75%

• 100%

Genotype is...

• Physical trait

• Color of feathers

• Combination of alleles

• Stem height

The term that relates to physical characteristics that are studied in genetics.

• Traits

• Pedigrees

• Offspring

• Genotypes

Factors that control traits are

• Purebreds

• Punnett Squares

• Pedigrees

• Genes

Scientists call an organism with two different alleles for a trait

• Purebred

• Hybrid

• Homozygous

• Recessive

If a homozygous black cat (BB) is crossed with a homozygous white cat (bb), what is the probability of having a cat with white fur?

• 0%

• 25%

• 50%

• 100%

What do we use pedigrees for?

• To look at familiesTo make determinations about the offspring

• To make determinations about the offspring

• To track traits in families

• Nothing

On a pedigree, this symbol represents...

• Affected Male

• Affected Female

• Non-affected Male

• Non-Affected Female