Question

1.

Given the following pathway to produce blue flowers, assume that A and B are dominant alleles specifying functional enzymes A and B, and a and b are recessive alleles specifying defective enzymes. Assuming complete dominance, if a plant with the genotype AABb was mated with a plant with the genotype Aabb, what proportion of their offspring will be blue?

A B

White Pigment ⟶Red Pigment⟶Blue Pigment

1/16

1/8

1/4

1/2

question2

In a pathway associated with duplicate gene action (redundancy), having a functional Gene A or Gene B is enough to produce purple flowers. If two heterozygous plants are mated, what phenotypic ratio will we see in their offspring regarding flower color?

9 purple: 7 white

13 purple: 3 white

15 purple: 1 white

question 3

A man with type A blood (I^Ai) has a child with a woman with type B blood (I^Bi). What are the chances that their child is type AB?

1/8

1/4

1/2

3/4

question 3

Which of the following sequences would run the fastest through an agarose gel during gel electrophoresis?

Group of answer choices

5’- AT -3’

5’- ATGCTGC -3’

5’- ATGCTGCAGTTA -3’

All of these sequences would run at the same speed

Answer 1

• In gel electrophoresis technique, DNA segments are arranged in sequence of size.
• DNA has negative charge and it moves in gel when electric force is applied.
• Shorter DNA fragments move faster in gel electrophoresis because of less resistance of gel.

Now in question,
Smallest DNA fragment run the fastest.
Option (a) 5' AT 3', is correct answer.