Q1_W3_POST-TEST

Which of the following best describes a DNA molecule?

• double helix

• contains ribose

• made of amino acids

• contains Uracil

Why is DNA important?

• it is very small and very complicated
• it's in everything
• it serves as the blueprint for traits of all living things
• because we eat it every day for energy

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

What are the three components of a nucleotide?

• sugar, hydrogen, nitrogen base
• sugar, oxygen, nitrogen base
• sugar, phosphate, nitrogen base
• sugar, phosphate, protein

Name this structure

• double helix
• nucelotide
• twisted ladder
• hydrogen bond

Tags

NGSS.HS-LS1-1

Which sequence of DNA bases would pair with this partial strand

ATG TGA CAG

• ATG TGA CAG

• TAC ACT GTC

• GTA AGT GAC

• CAT TCA CTG

What type of non-Mendelian inheritance takes place when two dominant alleles of a contrasting pair are fully expressed at the same time in the heterozygous individual?

• X-linked inheritance

• Incomplete Dominance

• Multiple Allelism

• Codominance

A cross between two plants that have pink flowers produced plants that have red, pink, or white flowers. Which is the most likely explanation for these results?

• Intermediate inheritance involved alleles that

  were not clearly dominant or recessive.

• Mutations occurred during gametogenesis.

• Crossing-over of white and red alleles occurred

  during meiosis.

• Nondisjunction of homologous pairs of

  chromosomes resulted in the production of

  abnormal offspring.

Two generations of offspring of four o’clock plants are shown . What Phenotypic Ratio (PR) is observed in the F1 generation?

• 1:1

• 2 : 0

• 1 : 0

• 2 : 2

32. What Genotypic Ratio is shown in the F2 generation?

A. 3:1 B. 1:2:1 C. 2:2 D. 4:0

• 3:1

• 1:2:1

• 2:2

• 4:0

What type of gene interaction is illustrated in the diagram?

• multiple aleles

• codominance

• incomplete dominnace

• complete dominance