Genotype and Phenotype

Blue is dominant; red is recessive. Which genotype(s) can represent blue?

• BB

• Bb

• bb

• BBb

Blue is dominant; red is recessive. Which genotype(s) can represent red?

• BB

• Bb

• bb

• BBb

​ (a)   alleles are always expressed when they are present.

​ (b)   alleles are only expressed when the dominant one is not present.

• Dominant
• Recessive

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

• recessive

• dominant

• lower case letter

• both 

Dominant alleles are represented by a:

• DNA

• Lowercase letter

• Recessive trait

• Capital letter

Recessive alleles are represented by a:

• DNA

• Lowercase letter

• protein

• Capital letter

Almost all human cells have

• 46 chromosomes

• 23 pairs of chromosomes

• 23 chromosomes

• 46 pairs of chromosomes

Black dots are dominant over orange spots. What phenotype is expressed with the genotype BB?

• Bb

• black

• orange

• bb

• BB

Black dots are dominant over orange spots. What phenotype is expressed with the genotype Bb?

• Bb

• black

• orange

• bb

• BB

DNA contains instructions to make

• cells

• proteins

• sugars

• cake