Genetics and Crosses Quiz

What is the genotypic ratio for Pp x Pp?

• 1 PP : 2 Pp : 1 pp

• 2 PP : 2 Pp

• 3 PP : 1 pp

• 4 Pp

Tags

NGSS.HS-LS3-3

What is the phenotypic ratio for Pp x Pp?

• 3 purple : 1 white

• 2 purple : 2 white

• 4 purple

• 1 purple : 3 white

What is the phenotypic ratio for Pp x PP?

• 100% purple

• 50% purple : 50% white

• 75% purple : 25% white

• 25% purple : 75% white

What is the phenotypic ratio for Pp x pp?

• 50% purple : 50% white

• 100% purple

• 75% purple : 25% white

• 25% purple : 75% white

What is the F1 result of PP x pp?

• 100% Pp (all purple)

• 50% Pp, 50% pp

• 100% PP

• 75% purple : 25% white

Tags

NGSS.HS-LS3-1

What is the F2 result of Pp x Pp?

• 75% purple : 25% white

• 100% purple

• 50% purple : 50% white

• 25% purple : 75% white

Tags

NGSS.HS-LS3-1

What is a test cross used for?

• Determining the genotype of a dominant-phenotype individual

• Finding the phenotype of a recessive plant

• Creating mutations

• Counting chromosomes

In a dihybrid cross (YyRr x YyRr), what is the phenotypic ratio?

• 9:3:3:1

• 3:1

• 1:1

• 4:0

In a dihybrid cross, what fraction of offspring are homozygous recessive for both traits?

• 1/16

• 1/4

• 1/8

• 1/2