Punnett Squares and Genetics

Which of the following are GENOTYPES? (select all correct answers)

• black hair

• homozygous dominant

• heterozygous

• blue eyes

• BB

Which of the following are PHENOTYPES?

• green skin

• Aa

• homozygous recessive

• purple eyes

• black fur

If A = red fur and a = white fur, what color fur would Aa be? (Assume Mendelian inheritance)

• red

• white

• purple

• blue

Tags

NGSS.HS-LS3-1

If A = red fur and a = white fur, what are the PHENOTYPIC ratios of the offspring based on the Punnett Square?

• 25% heterozygous

• 50% purple

• 75% red fur and 25% white fur

• 25% homozygous recessive, 50% heterozygous, 25% homozygous dominant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In plants, tall (T) is dominant to short (t).

Draw a punnett square and perform the following cross: Tt x Tt

What is the probability of producing a short plant?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What allele combination should go in the missing box?

• AA
• Aa
• aa
• none of these

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What are the possible genotypes for this cross? And what percentage of each is produced?

• TT = 25% Tt= 50% tt=25%

• all tall

• TT= 75% tt = 25%

• Tt = 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Who was the Austrian monk that experimented on pea plants and is called the "father of genetics"?

• Gregor Mendel

• Charles Darwin

• Francis Crick

• James Watson

The only way for a recessive trait to appear is for an organism to have

• two dominant alleles

• two recessive alleles

• one dominant allele and one recessive allele

Each one of the boxes on the Punnett square represents what probability of an offspring's genotype?

• 25%

• 1%

• 10%

• 0%

Tags

NGSS.HS-LS3-1