EOC Biology Genetics

Which 2 parts of a nucleotide form the sides or "backbone" of the DNA ladder?

• Nitrogenous Base

• Phosphate group

• Deoxyribose sugar

• Ribose sugar

Select the correct complementary DNA strand for the following sequence: TAC-GCT

• ATG-CGA

• AUG-CGA

• TAC-GCT

• GTC-ATC

During DNA replication, an enzyme called ________ is responsible for attaching new nitrogenous bases to each unzipped strand of the DNA.

• Helicase

• Lactose

• Catalase

• DNA Polymerase

In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?

• Tall = T
  Short = S

• Tall = T
  Short = t

• Tall = t
  Short = T

• Tall = TT
  Short = tt

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What is the genotypic ratio of the offspring?

• 3:1

• 1:3

• 1:2:1

• 2:2

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What are the phenotype percentages of the offspring?

• 50 % Brown fur and 50% White fur

• 25 % Brown fur and 75% White fur

• 75 % Brown fur and 25% White fur

• 0% Brown fur and 100% White fur

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In rabbits, black fur (B) is dominant over brown fur (b). If a rabbit has brown fur, what can you conclude about its genotype?

• It is BB.

• It is Bb

• It is brown

• It is bb.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

One dog carries homozygous, long-haired traits (SS), and its mate carries homozygous short-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having long hair.

• 100%

• 75%

• 50%

• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Which of the following codes for blood type O?

• I^A I^A

• I^B i

• I^A I^B

• ii