Meiosis and Punnett Squares

You create a punnett square to determine the probability of hair color being passed to offspring. Brown hair color is dominant. Blond hair is recessive. Both parents have brown hair. The mother is homozygous dominant. The father is heterozygous. What is the probability that the offspring will have brown hair?

• 100%

• 75%

• 50%

• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

You create a punnett square to determine the probability of hair color being passed to offspring. Brown hair is dominant. Blond hair is recessive. Both parents have brown hair. Both parents are heterozygous. What is the probability that the offspring will also have brown hair?

• 100%

• 75%

• 50%

• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What is the benefit of crossing over and what phase?

• it makes the chromosomes all lined up and occurs in metaphase

• it exchanges genetic information increasing variability. Occurs in prophase I

• it keep the genetic information identical and occurs during cytokinesis

• none of the following are true

Heterozygous genotype is expressed with ______

• two capital letters like BB

• one capital and one lowercase like Bb

• two lower case letters like bb

If I were to cross a heterozygous with another heterozygous, regardless of the trait, what is the chance of the offspring expressing the recessive trait?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If I were to cross a homozygous dominant tall with a homozygous recessive short, what would be the percentage of tall offspring?

• 0%

• 100%

• 25%

• 50%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following would represent homozygous?

• AA, BB, rr

• AA, Bb, Rr

• Aa, Bb, Rr

• aa, bb, Rr

Brown fur color is dominant over black fur color. Which of the following is the actual genotype of ALL of the offspring in the next generation of this cross for fur color?

• AA

• Aa

• aa

• brown fur

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What are the possible combinations of a pea plant with the alleles PP and a male pea plant with the alleles pp.
P= purple
p= white

• all Pp

• all PP

• Pp,PP,Pp,PP

• all pp

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What does a Punnett Square determine?

• all of Mendel's discoveries about genetic crosses

• all the outcomes of a genetic cross

• only the recessive allele combinations

• only the dominant allele combinations