Question
The diagram shows a section of DNA, with four bases identified on one strand
Which sequence of bases would be on the other strand, starting from the top?
A AGTC B CTGA C GACT D TCAG
Answer/Explanation
Ans
B
Question
What are alleles?
A a pair of chromosomes
B different versions of the same gene
C the total number of genes on one chromosome
D two genes side by side on the same chromosome
Answer/Explanation
Ans
B
Question
Two animals have an identical sequence of amino acids in one of the proteins found in their cells.
What does this indicate about these animals?
A They have been eating the same types of food.
B They have not been exposed to substances that cause mutation.
C They must be members of the same genus.
D They share a recent ancestor.
Answer/Explanation
Ans
D
Question
Which sex chromosomes in the egg and the sperm will produce a male child?
Answer/Explanation
Ans
B