Punnett Square & Genetics

A green pea plant (Gg) is crossed with a yellow pea plant (gg). (Green in dominant.) Describe the genotype possibilities for the offspring.

• 50% heterozygous and 25% homozygous recessive

• 50% heterozygous and 50% homozygous recessive

• 100% homozygous recessive

• 25% heterozygous and 50% homozygous

Tags

NGSS.HS-LS3-1

A tall plant (Tt) is crossed with a short plant (tt). What is the possible phenotypic ratio for the offspring?

• 75% tall: 25% short

• 25% tall: 75% short

• 50% tall: 50% short

• 100% tall: 0% short

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

AA and Aa always show the ___ phenotype.

• dominant

• recessive

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

How many alleles does an individual normally have for each trait?

• 1

• 2

• 3

• 4

What is the phenotypic ratio of the offspring for this cross? Allele Key = Brown hair = A, blond hair = a

• 50 % Brown Hair: 50% blond Hair

• 25 % Brown Hair: 75% blond Hair

• 75 % Brown Hair: 25% blond Hair

• 0% Brown Hair: 100% blond Hair

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Aa, DD, Bb, yy are all examples of

• genotypes

• phenotypes

Which of the following would be a phenotype?

• Aa

• Red Hair

• Heterozygous

• DNA

Which of these characteristics would not be passed on to its offspring?

• fur color

• length of tail

• scars on leg

• body size

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Who is considered the "father of genetics"?

• Reginald Punnett

• Gregor Mendel

• James Watson

• Charles Darwin