WorksheetsDiscussion 4/12
Total questions: 11
Worksheet time: 10mins
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
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
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%
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.
Two white-flowered parents reproduce. What color will 100% of the offspring be?
white
Two pink-flowered parents reproduce. What color will 50% of the offspring be?
pink
Two red-flowered parents reproduce. What color will 100% of the offspring be?
red
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
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.
The diagram below illustrates the chemical structure of the DNA molecule. Click on the part of the diagram that shows a deoxyribose sugar molecule.
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) .
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
The image above represents a human karyotype or chromosome map. What does the 23rd pair help to determine?
Select TWO correct answers.
The gender of the baby at birth.
The shape of the chromosome pair determines DNA pairing as per Chargaff's Rule.
XY would be a boy, and XX would be a girl.
If pairs are not all matching, they are paired off incorrectly.
XX determines whether the offspring will inherit a host of dominant diseases.
