Discussion 4/12

Nucleotides are composed of a phosphate group, a sugar, and a nitrogenous base. DNA is made up of long strands of nucleotides. Which part of the above molecule does not differ between nucleotides?

• the sugar

• the phosphate group

• the nitrogenous base

• the sugar and phosphate group

Tags

NGSS.HS-LS1-1

Use the following codon chart to see what amino acid chain would come from this mRNA strand:

5' AUGAUACAAUUA 3'

• Methionine - Tyrosine - Asparagine - Leucine

• Leucine - Glutamine - Isoleucine - Methionine

• 
  Methionine - Isoleucine - Glutamine - Leucine

• Isoleucine -Methionine - Glutamate - Leucine

Tags

NGSS.HS-LS1-1

For a species of tropical plant, leaves with green veins (G) are dominant over leaves with red veins (g). A plant that has green veins (GG) is crossed with a plant with red veins (gg). What percentage of offspring will have red veins?

• 100%

• 75%

• 25%

• 0%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

This question has two parts. First, answer Part A. Then, answer Part B. 

Part A

The diagram below, of incomplete dominance, shows the crossing of two parent plants to produce heterozygous dominant offspring. In this case, however, the dominant trait doesn't express itself fully in the visible phenotype. 

If two of the incomplete dominant, heterozygous offspring were to reproduce, what will be the phenotype of 25% of the offspring?

Click on the color of the correct answer in the graphic.

Match the following: Referencing the graphic above, read the rows in the table below which describe crosses between flowers in the incomplete dominance situation described in the graphic.  Match the correct color for each one.

• red

• Two white-flowered parents reproduce. What color will 100% of the offspring be?

• pink

• Two pink-flowered parents reproduce. What color will 50% of the offspring be?

• white

• Two red-flowered parents reproduce. What color will 100% of the offspring be?

A segment of DNA is represented in the illustration.

How is information for a specific protein carried on the DNA molecule?

• As a sequence of nucleotides

• In the double-helix of the condensed chromosome

• In the ratio of adenine to thymines

• As a pattern of phosphates and sugars

Tags

NGSS.HS-LS1-1

The diagram above shows the Law of Segregation.

Which statements below are supported by the diagram? 

Select TWO correct answers. 

• A gene exists in one form for each characteristic.

• The two alleles of a pair are always the same.

• When gametes are formed, the alleles for each gene separate.

• Every organism inherits one allele for each trait.

• Offspring receive one allele for each gene from each parent.

Tags

NGSS.HS-LS3-1

The diagram below illustrates the chemical structure of the DNA molecule. Click on the part of the diagram that shows a deoxyribose sugar molecule.

Tags

NGSS.HS-LS1-1

For each DNA base sequence listed below, drag over the complimentary base sequence that correlates to Chargaff's Rules. 

 

A DNA strand has a sequence of ATCGCGC. ​ (a)     is the complimentary base sequence to this first example.

A second DNA strand has a sequence of CCGATTA. ​ (b)   is the complement according to Chargaff's Rules.

A third sequence of TTATTCG would be complemented by a sequence of ​ (c)   .

A final DNA sequence of TATAGGC would be complemented by ​ (d)   .

• TAGCGCG
• GGCTAAT
• AATAAGC
• ATATCCG
• UAGCGCG
• GGCUAAU
• AAUAAGC
• AUAUCCG

A husband is homozygous for blood type A and his wife is heterozygous for blood type B. What are the possible blood types for their offspring?

Select TWO correct answers.

• B

• O

• ABO

• AB

• A

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2