Genetics Crosses

Brown (B) is dominant over white (b). Which genotype is a purebred for brown fur?

• BB

• Bb

• bb

• All of the above

In the punnett square below, what belongs in the missing square

• tt

• Tt

• TT

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Cross (Dad)Bb X (Mom)BB. List the possible genotypes from this cross.

• BB, Bb, bb

• BB

• BB, Bb

• bb,Bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The passing of genetic traits from parent to offspring is known as

• heredity

• trait

• gene

• allele

Tags

NGSS.HS-LS3-1

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

• homozygous

• hetrozygous

• protein

• chromosome

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

• protein

• homozygous

• heterozygous

• genotype

An allele whose trait is always expressed when it is present in the organism.

• recessive allele

• dominant allele

• hidden allele

• present allele

An allele whose trait is only expressed when no dominant allele is present.

• hidden

• dominant

• recessive

• present

Which of the following genotypes would be considered heterozygous?

• BB

• bb

• Tt

• TT

Which of the following alleles is homozygous recessive?

• Tt

• tt

• TT

• T