Genetics (short version)

The study of heredity

• Genetics

• Genome

• Allele

• Punnett Square

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The instruction of one allele covers up the instruction

of the other allele in a homologous pair. Symbolized by a capital letter.

• Recessive Allele

• Dominant Allele

• Heredity

• Trait

Tags

NGSS.HS-LS3-1

What is the genotype for a pea plant heterozygous for round seeds (R), and homozygous recessive for green seeds (y)?

• Ry
• RRyy
• RrYy
• Rryy

Tags

NGSS.HS-LS3-1

In a dihybrid cross

• one trait is crossed.
• two traits are crossed.
• four boxes are needed for the punnett square.
• mom's alleles are dominant.

Tags

NGSS.HS-LS3-3

Which of the following genotypes is heterozygous?

• Bb
• BB
• bb
• B

Tags

NGSS.HS-LS3-1

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes

Tags

NGSS.HS-LS3-1

Which of the following would be a phenotype?

• Aa

• red hair

• heterozygous

• DNA

Tags

NGSS.HS-LS3-3

What is the genotypic ratio of the offspring?

• 3:1

• 1:3

• 1:2:1

• 2:2

Tags

NGSS.HS-LS3-3

What are the phenotype percentages of the offspring?

(A-Brown fur color; a-white fur color)

• 50 % Brown fur and 50% White fur

• 25 % Brown fur and 75% White fur

• 75 % Brown fur and 25% White fur

• 0% Brown fur and 100% White fur

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

In guinea pigs, the allele for short hair is dominant over the allele for long hair.
B = short 
b = long
What would the cross be for two heterozygous guinea pigs?

• BB X BB
• BB X Bb
• Bb X Bb
• bb X bb

Tags

NGSS.HS-LS3-1