Punnett Squares/Monohybrid Crosses

Dominant alleles are represented by a:

• Male gene
• lowercase letter
• recessive trait
• capital letter

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes

Tags

NGSS.HS-LS3-1

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

• recessive
• dominant
• lower case letter
• both 

What you see, or the physical appearance.

• Genotype
• Phenotype
• Homozygous
• Heterozygous

Tags

NGSS.HS-LS3-1

T - tall and t = short

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

• tt

• Tt

• Bb

• TT

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

B = brown eyes

b = blue eyes

One brother has genotype BB and the other brother has genotype Bb.

Which statement is true about these two brothers?

• They have same phenotype and genotype

• They have different phenotypes and genotypes

• They have same phenotype, but different genotypes

• They have different phenotypes, but the same genotype

Tags

NGSS.HS-LS3-1

The genotype Aa is called . . .

• Homozygous recessive

• Hybrid

• Purebred

• Homozygous dominant

Which of the following would be a phenotype?

• Aa

• red hair

• heterozygous

• DNA

Tags

NGSS.HS-LS3-1

Which of the following genotypes are Purebred? Select 2 answers.

• aA

• Aa

• AA

• aa

Which of the following genotypes is heterozygous?

• Bb
• BB
• bb
• B

Tags

NGSS.HS-LS3-1