A _______________ allele is always expressed, while a __________________ allele can be "hidden."

• dominant/recessive

• recessive/dominant

One parent has blue eyes, rr. Another parent has brown eyes, RR. How likely is it the offspring will have blue eyes?

• 0/4

• 4/4

• 1/4

• 3/4

• 2/4

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

One parent has blue eyes, rr. Another parent has brown eyes, RR. How likely is it the offspring will have brown eyes?

• 0/4

• 4/4

• 1/4

• 3/4

• 2/4

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

B= brown eyes

b = blue eyes

What is the probability of blue eyes?

• 0/4 impossible

• 1/4 unlikley

• 2/4 equally likely

• 3/4 likely

• 4/4 certain

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

B= brown eyes

b = blue eyes

What is the probability of brown eyes?

• 0/4 impossible

• 1/4 unlikley

• 2/4 equally likely

• 3/4 likely

• 4/4 certain

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

R= red fur

r = white fur

What is the probability of red fur?

• 0/4 impossible

• 1/4 unlikley

• 2/4 equally likely

• 3/4 likely

• 4/4 certain

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

R= red fur

r = white fur

What is the probability of white fur?

• 0/4 impossible

• 1/4 unlikley

• 2/4 equally likely

• 3/4 likely

• 4/4 certain

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

R= red fur

r = white fur

What is the probability of white fur?

• 0/4 impossible

• 1/4 unlikley

• 2/4 equally likely

• 3/4 likely

• 4/4 certain

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

R= red fur

r = white fur

What is the probability of red fur?

• 0/4 impossible

• 1/4 unlikley

• 2/4 equally likely

• 3/4 likely

• 4/4 certain

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Which is true?

• You need two recessive alleles to express a trait.

• You need two dominant alleles to express a trait.

• You need only one dominant allele to express a trait.

• You need only one recessive allele to express a trait.