Genetics

The exact genetic makeup of an organism, such as RR, Tt, PP is its?

• phenotype
• dominance
• genotype
• trait

If "T" is the allele for tall and "t" is the allele for short, then Tt would produce?

• tall
• short
• medium
• not enough info

Red (R) is dominant over white (r). How can a flower be white?

• It can have RR and be white.

• It has to have rr.

• It has to have rR

• There is no way it can be white until the third generation.

In guinea pigs, the alleles for black hair(B) is dominant to the allele for brown hair(b). Two black-haired guinea pigs are crossed. One of the pigs is homozygous for black hair and one is heterozygous. What percentage of their offspring are expected to have black hair?

• 25%
• 50%
• 75%
• 100%

It is the trait that is always expressed and written in capital letters.

• Dominant allele

• Recessive allele

• DNA

• RNA

Green peas are dominant (G) to yellow peas (g). What is the genotype for a hetereozygous dominant offspring?

• Gg

• gg

• GG

• none of these

Which of the following is a heterozygous dominant genotype? 

• GG
• gg
• GGG
• Gg

In Mendel's pea plants, the homozygous recessive phenotype was white flowers.  If Mendel crossed two homozygous recessive pea plants, what color flowers would be seen in the offspring?

• white and purple
• white 
• purple
• lavendar

What percentage of the offspring will be purebred dominant?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Dominant alleles are represented by a(n)

• phenotype
• lower case letter
• upper case letter
• punnett square