Punnett Squares and Pedigrees

Heterozygous is when...

• the alleles are the same
• the alleles are different
• the alleles are absent
• the alleles are present

Tags

NGSS.HS-LS3-2

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

• recessive
• dominant
• lower case letter
• both 

Where do the parents genotype/alleles go when making a punnett square?

• one parent allele inside each of the 4 squares

• one parent's goes on top of the punnett square, and the other parent's goes on the side of the punnett square

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-LS3-3

B = brown fur  b = white fur
In the punnett square, what is the probability for white fur? 

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-3

Which of the following is NOT a genotype?

• heterozygous
• a trait
• Bb
• homozygous recessive

Which of the following alleles is homozygous (purebred) recessive?

• Tt
• tt
• TT
• t

Tags

NGSS.HS-LS3-1

What are alleles?

• Different versions of genes that code for various traits

• The observable traits of organisms.

• Another word for chromosomes

• Phenotypes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

How many alleles (letters) do each person carry for a trait?

• 1
• 2
• 3
• 4

Tags

NGSS.HS-LS3-1