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Punnett Square Questions and Answers (Q&A)

John Adney
Answered: Feb 12, 2017
The "correct" answer isn't right because the only possible outcomes of Yy and yy is Yy and yy... there is no possible way the offspring could be purebred... only heterozygous or white

5 Answers

Markda John
Answered: Jan 02, 2018
This kind of gene inheritance is known as codominance. The black chickens are all black because that’s the only gene they have for feather coloring. Same with the white chickens. However,...Read More

4 Answers

Robert Hazlewood, Senior Executive
Answered: Dec 26, 2018
Correct answer is option B – 25%
The chance that the child will have sickle cell anemia if Tracy’s parents have another child is 25%.
It is important to note that the...Read More

4 Answers

John Adney
Answered: May 04, 2017
The answer should be dominant. Both red parents are Rr where R is red and r is white. In such a cross, 3/4s of offspring are expected to be red and 1/4 white.

3 Answers

John Adney
Answered: Feb 13, 2017
How can it be Bb when homozygous means either the lower case is BB or bb. But in the problem it also says recessive. So can someone please explain to me what and how theanswer is Bb instead if bb.

3 Answers

Christian Jackson, Content Developer
Answered: Feb 01, 2019
The best answer to this is letter A. it is already a known fact that A will dominate a when it comes to the color of the peas. B that stands for smooth will definitely overpower b that stands for...Read More

2 Answers

G.Carol
Answered: Feb 19, 2018
The DNA is a two strand molecule. It is designed in a manner such that one part comes from the mother and the other from the father. Each piece is corresponding to the other, so, basically, each...Read More

2 Answers

Bella
Answered: Nov 14, 2017
If they were codominant then all the flowers would be pink (RR crosses with WW, but both are red so if they were codominant RR crosses RR producing all RR), this answer is incorrect. The answer...Read More

2 Answers

John Adney
Answered: Dec 18, 2016
It is incomplete dominance because both allele pairs are dominant and neither have a dominant allele.

2 Answers

Rindisanders
Answered: Jul 03, 2017
The question states that yellow fur is dominant over white fur. Given that the alleles for these two traits are a capital Y and a lowercase y, the genotype for the heterozygous cat would be 'Yy'...Read More

2 Answers

John Smith
Answered: Feb 17, 2020
Aa

1 Answer

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