Genetics

Which of the following is a homozygous dominant for brown eyes?

• bb

• BB

• bB

• Bb

Tags

NGSS.HS-LS3-2

If the dominant trait is having brown eyes (B) and the recessive trait is having blue eyes(b). What allele combination(s) below would represent a person who has brown eyes?

• bB

• bb

• BB

• Bb

Tags

NGSS.HS-LS3-1

A __________ cross involves one trait.

A ________ involves two traits

A grid system for predicting all the possible genotypes resulting from a cross.

• Mendel's law

• genotype

• alleles

• Punnett square

If you cross a homozygous dominant and a homozygous recessive, you get:

(genotype ratio)

• 1:2:1

• 3:1

• 0:4:0

• 2:1

If you cross a homozygous dominant and homozygous recessive you get:

• all heterozygous

• All homozygous dominant

• all homozygous recessive

• 50% dominant 50% recessive

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If we cross 2 heterozygous we get:

(phenotype ratio)

• 2:1;1

• 1:2:1

• 3:1

• 2:2

If we cross 2 heterozygous you get:

• 100% heterozygous

• 50% homozygous dominant

  25% heterozygous

  25% homozygous recessive

• 50% heterozygous

  25% homozygous dominant

  25% homozygous recessive

• 50% dominant

  50% recessive

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

How is a recessive alleles represented?

• by lowercase letters

• by uppercase letters

• by a big letter and a little letter

• by a dominant allele