Genetics Quiz 1

Which genotype below represents homozygous dominant?

• bb

• Bb

• BB

• B

Recessive traits....

• Are only expressed (shown) when the genotype is heterozygous

• Are only expressed (shown) when the genotype is homozygous dominant

• Are never expressed (shown)

• Are only expressed (shown) when the genotype is homozygous recessive

Different forms of the same gene are known as what?

Which genotype below represents homozygous recessive?

• yy

• YY

• Yy

• y

Given this Punnett square, what genotype would go in Box 2?

• BB

• Bb

• bb

• b

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If the tall trait (T) is dominant over the recessive dwarf trait (t), what two genotypes could a tall plant be? (be sure to check both types)

• TT

• tt

• Tt

• T

Given this Punnett square, what percentage of the offspring will be heterozygous?

• 25%

• 50%

• 75%

• 100%

"Pure" bred in genetics means....

• Heterozygous genotypes

• Superior in every way to hybrids

• Mutts

• Homozygous genotypes

Chromosomes are made up of proteins and genetic material called....

• RNA

• Fatty acids

• DNA

• Lipids

What percentage of the offspring in the Punnett square exhibit (show) the dominant phenotype?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2