Punnett Square PRACTICE PROBLEMS

​A (a)   is the DNA or allele combination for a trait. The physical, observable trait is called the ​ (b)  

• Genotype
• Phenotype.

Tags

NGSS.HS-LS3-1

The GENOTYPIC percentage resulting from this cross would be _____________________.

• 25% blue eye 75 % brown eye
• BB= 50 % bb = 50%
• BB = 25% Bb = 50% bb = 25%
• All brown eye

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Two heterozygous parents produce offspring. What is the probability of the HETEROZYGOUS GENOTYPE appearing in the offspring generation?

• 75%
• 25%
• 50%
• 100%

Tags

NGSS.HS-LS3-3

HH crossed with Hh. What is the probability of hh?

• 0%
• 25%
• 50%
• 100%

Tags

NGSS.HS-LS3-3

Having a Widow's Peak is dominant (W) over not having one (w). If parent A (WW) and parent B (ww) have a child, what is the likelihood that--

• 0%

• The child will not have a widow's peak

• 100%

• The genotype of these children

• Ww

• The child will have a widow's peak

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

T - tall and t = short. In the Punnett square below, what belongs in the missing square (a)  

• tt
• Tt
• Bb
• TT

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Having a Widow's Peak is dominant (W) over not (w). If parent A (WW) and parent B (ww) have a child, what is the likelihood that--

• Ww

• The child will not have a widow's peak

• 0%

• The genotype of these children

• 100%

• The child will have a widow's peak

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If the 2 alleles of a trait are different, the individual is ______.

• Homozygous

• Heterozygous

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If the 2 alleles of a trait are the same, the individual is ______.

• Homozygous

• Heterozygous

Tags

NGSS.HS-LS3-1

The exact genetic makeup of an organism, such as RR, Tt, PP is its?

• phenotype
• dominance
• genotype
• trait