Monohybrid Cross

When a person has two different alleles for a gene, they are said to be

• heterozygous
• homozygous

A __________ allele always shows up in an organism when the it is present.

• dominant
• hybrid

Dominant alleles are represented by a:

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

aa always shows up as

• dominant
• recessive

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

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous
• DNA

Which of the following genotypes is homozygous dominant?

• A
• Aa
• AA
• aa

Which of the following genotypes is heterozygous?

• Bb
• BB
• bb
• B

What are the possible genotypes for this cross?

• TT = 25% Tt= 50% tt=25%
• all tall
• TT= 75% tt = 25%
• Tt = 100%

the physical characteristics that result from genes

• phenotype
• genotype
• heterozygous
• homozygous

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2