2.2.3

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

• protein

• homozygous

• heterozygous

• genotype

What does heterozygous mean?

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

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

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

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

Which of the following is homozygous dominant?

• Yy

• Y

• yy

• YY

Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.

• DNA

• protein

• RNA

• glucose nucleic acid (GNA)

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

An allele whose trait only shows up when no dominant allele is present.

• hidden allele

• dominant allele

• recessive allele

• present allele

A gene is

• a section of DNA

• a chemical found in the nucleus of cells

• contains instructions for building a protein

• all of the above

Tags

NGSS.HS-LS1-1

Human gametes contain how many chromosomes?

• 46

• 23

• 12

• 28

One form of a gene is called_______________

• a DNA

• a Phenotype

• a trait

• an allele

Which is the correct phenotype for this organism?

• BB

• blue

• green

• bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Assuming a trait is AUTOSOMAL RECESSIVE, what genotype would make a person AFFECTED?

• AA

• Aa

• aa

• X^AY

• X^aY

Tags

NGSS.HS-LS3-1