Word Problem Steps

1. #1 Step 1

2. In cacti, long arms are dominant to short arms.  Suppose 2 heterozygous cacti are crossed.  What are your traits?

• Long- L

  Short- l

• Long- l

  Short- L

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

1. #1 Step 2

2. In cacti, long arms are dominant to short arms.  Suppose 2 heterozygous cacti are crossed.  What are the parent genotypes?

• LL x ll

• Ll x Ll

• ll x ll

• Ll x LL

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

#1 Step 3

In cacti, long arms are dominant to short arms.  Suppose 2 heterozygous cacti are crossed.  What percentage of their offspring are expected to have short arms?

• 0%
• 25%
• 75%
• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

#2 Step 1

Round seeds are dominant over wrinkled seeds. A homozygous round seed is crossed with a homozygous wrinkled seed. What are your traits?

• Round- r

  Wrinkled- R

• Round- R

  Wrinkled- r

Tags

NGSS.HS-LS3-2

#2 Step 2

Round seeds are dominant over wrinkled seeds. A homozygous round seed is crossed with a homozygous wrinkled seed. What are your parents genotypes?

• RR x rr

• Rr x Rr

• rr x rr

• RR x Rr

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

#2 Step 3

Round seeds are dominant over wrinkled seeds. A homozygous round seed is crossed with a homozygous wrinkled seed. What percentage of the offspring will be round?

• 0%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

# 3 Step 1

In guinea pigs, the allele for short hair is dominant over the allele for long hair.

A heterozygous guinea pig is crossed with a long haired guinea pig. What are your traits?

• Long- H

  Short- h

• Long- h

  Short- H

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

# 3 Step 2

In guinea pigs, the allele for short hair is dominant over the allele for long hair.

A heterozygous guinea pig is crossed with a long haired guinea pig. What are your parent genotypes?

• HH x hh

• Hh x hh

• HH x HH

• hh x HH

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

# 3 Step 3

In guinea pigs, the allele for short hair is dominant over the allele for long hair.

A heterozygous guinea pig is crossed with a long haired guinea pig. What is the phenotype ratio (short : long)?

• 3:1

• 1:3

• 2:2

• 4:0

Tags

NGSS.HS-LS3-1

#4 Step 1

A homozygous recessive wrinkled seeded plant is crossed with a homozygous dominant round seeded plant. What are your traits?

• wrinkled- r

  Round- R

• wrinkled- R

  Round- r

Tags

NGSS.HS-LS3-3