11U Genetics Review

An organism's phenotype describes its __________.

• genetic makeup
• physical appearance

What do you call a section of DNA that codes for a specific trait?

• nucleus
• chromosome
• gene
• DNA

Tags

NGSS.HS-LS3-1

NGSS.HS-LS1-1

How many chromosomes are found in human egg and sperm cells?

• 20
• 23
• 26
• 46

A dominant trait shows up __________.

• only when two dominant alleles are present
• only when one dominant allele is present
• when at least one recessive allele is present
• when at least one dominant allele is present

Tags

NGSS.HS-LS3-1

If you cross two parents, both with genotype Bb, what percentage of children will have brown eyes?

• 25%
• 50%
• 75%
• 100%

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

Plant height is T = tall and t = short. Flower color is P = purple and p = white. Which genotype is NOT possible for a tall plant with purple flowers?

• TtPp
• TTPP
• TTPp
• ttpp

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What are traits that aren't dominant over each other but whose heterozygous outcome is a combination of the two equally but separately?

• pure dominance
• incomplete dominance
• co-dominance
• simple dominance

Who was the father of genetics?

• Mendel
• Einstein
• Redi
• Pasteur

If there is a cross of a red and white chicken, and the trait is co-dominant, what will be the result?

• a blended color
• a speckled chicken

If red and white have incomplete dominance for a trait, and a red flower is crossed with  a white flower, what will be the result?

• a spoted flower
• a blended flower