Genetics Review

Genotype refers to the ...

• physical expression of the genes

• whether an allele is dominant or recessive

• the possible combination of alleles in a gene

• how an organism will appear

Tags

NGSS.HS-LS1-1

What is phenotype?

• the genetic makeup of alleles

• the physical triait

Having two of the same genes for the trait (sometimes called purebred).

• homozygous

• heterozygous

• hybrid

• phenotype

Having two different genes for a trait (sometimes called hybrid).

• homozygous

• heterozygous

• purebred

• phenotype

G = green, g = yellow

The genotype for a yellow plant is...

• GG

• Gg

• gg

• all of the choices result in yellow

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

W = White, R = Red

The genotype for a red and white spotted plant is...

• WW

• RW

• RR

• WRWR

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Term for an organism that display two dominant phenotypes at the same time

• codominance

• complete dominance

• incomplete dominance

• multiple alleles

What does heterozygous mean?

• An organism that has the same genes for a trait (TT or tt)

• When neither gene is fully dominant; offspring is a mixture of both

• An organism that has different genes for a trait (Tt)

• the different forms of a trait (hair color--> brown, blonde, red

Complete dominance means that the traits are

• expressed equally.

• dominant or recessive.

• blended.

• recessive only.

Which of the following is homozygous dominant?

• HH

• hh

• Hh

• H