AP Bio Insta-Review Topic 5.4: Non-Mendelian Genetics

Cross between dihybrid and double recessive: what ratio do you expect?

• 1:1:1:1

• 1:2:1

• 9:3:3:1

• 12:3:1

Parents:

Green, Smooth x Yellow, Wrinkled

Offspring:

Green, Smooth = 425

Green, Wrinkled = 50

Yellow, Smooth = 75

Yellow, Wrinkled = 450

What process explains the recombinants made?

• Crossing over

• Independent Assortment

• Metabolism

• Mitosis

Tags

NGSS.HS-LS3-2

A mutation in the mitochondrial DNA is from

• Father

• Mother

• Both parents

• Neither random occurrence

Tags

NGSS.HS-LS3-2

What is the expected ratio of dihybrid in a test cross?

• 1:1:1:1

• 1:2:1

• 9:3:3:1

• 9:3:4

If genes are linked, how would this affect the 1:1:1:1 ratio from testcross?

• Linkage will not affect the predicted ratios

• More parentals (>50%)

• More recombinants (>50%)

• Ratio follows 9:3:3:1

With linked genes, how do recombinants form?

• Crossing over

• Independent assortment

• Random fertilization

• Transformation

If a male (AMAB) is affected by a sex-linked trait which parent passed it on?

AMAB – assigned male at birth

• Father

• Mother

Tags

NGSS.HS-LS3-1

Which organelle contains DNA?

• Chloroplast

• Mitochondria

• Nucleus

• All of the above

Mitochondrial inheritance follows the ____

• Egg

• Sperm

In a pedigree and determining mode of inheritance…

• A dominant trait is found in every generation

• A dominant trait will skip generations

• A dominant trait is only found in males

• A dominant trait that is found in all offspring of affected females