Monohybrid

Round seeds (R) are dominant over wrinkled seeds (r). What percentage of the offspring will be round from the following cross?
Rr X Rr

• 100%
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-3

Round seeds (R) are dominant over wrinkled seeds (r). What percentage of the offspring will be round from the following cross?
RR X Rr

• 100%
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-3

A tall pea plant (TT) is crossed with a short pea plant (tt). What percentage of the offspring will be tall?

• 100%
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A heterozygous round seeded plant (Rr) is crossed with a homozygous dominant round seeded plant (RR). What percentage of the offspring will be homozygous dominant?

• 100%
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-3

A homozygous dominant round seeded plant is crossed with a homozygous recessive wrinkled seeded plant. What are the genotypes of the parents?

• RR X rr
• Rr X rr
• rr X rr
• RR X Rr

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A homozygous round seeded plant is crossed with a homozygous wrinkled seeded plant. What percentage of the offspring will be homozygous recessive?
R = round
r = wrinkled

• 75%
• 50%
• 25%
• 0%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In guinea pigs, the allele for short hair is dominant over the allele for long hair.
B = short 
b = long
What genotype would a heterozygous short haired guinea pig have?

• BB
• bb
• Bb

In guinea pigs, the allele for short hair is dominant over the allele for long hair.
B = short 
b = long
What genotype would a homozygous recessive guinea pig have?

• BB
• bb
• Bb

Tags

NGSS.HS-LS3-1

In guinea pigs, the allele for short hair is dominant over the allele for long hair.
B = short 
b = long
A purebred short haired guinea pig is crossed with a long haired guinea pig. What percentage of their offspring will have short hair?

• 100%
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-1

In guinea pigs, the allele for short hair is dominant over the allele for long hair.
B = short 
b = long
What would the cross be for two heterozygous guinea pigs?

• BB X BB
• BB X Bb
• Bb X Bb
• bb X bb

Tags

NGSS.HS-LS3-1