Monohybrid & Dihybrid Cross

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

• heterozygous
• homozygous

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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

• dominant
• hybrid

Tags

NGSS.HS-LS3-1

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a dihybrid cross

• one trait is crossed.
• two traits are crossed.
• four boxes are needed for the punnett square.
• mom's alleles are dominant.

Tags

NGSS.HS-LS3-3

Which of the following genotypes is heterozygous?

• Bb
• BB
• bb
• B

Tags

NGSS.HS-LS3-1

Mendel's early work with pea plants demonstrated a significant genetic discovery. The crossing of homozygous tall pea plants with homozygous short pea plants always resulted in tall plants and demonstrated that tallness in pea plants is a trait that is —

• blended

• dominant

• mutated

• 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

What allele combination should go in the missing box?

• AA
• Aa
• aa
• none of these

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Dominant alleles are represented by a:

• Male gene

• Lowercase letter

• Recessive trait

• Capital letter

Tags

NGSS.HS-LS3-2

What is the dominant trait?

• yellow pea seeds
• green pea seeds
• there is no dominant seed
• Jolly green giant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2