Two pea plants are crossed. One plant is homozygous dominant for purple flowers, and the other is homozygous recessive for white flowers. What fraction of the F2 population will have white flowers?
Correct answer: A. 1/4
- A. 1/4
- B. 1/2
- C. 1/8
- D. 1/16
Explanation
When both parents are crossed, we will get an F1 generation with heterozygous purple flowers. When F1 is crossed with F2, we get the following ratio. Purple-flowered: white-flowered 3: 1 Hence, ¼ of the plants will have white flowers. Option A is the correct option.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
Practise Inheritance
1,238 free Inheritance MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Inheritance questions
In mammals, which type of phenotypic expression will show recessive traits more frequently in males than females?
Gene is the molecular unit of the following:
The number of linkage groups in humans is?
What contributes to genetic variation during human reproduction?
The specific location of gene and DNA sequence on a chromosome is called?
The region of DNA that encodes a functional RNA or protein product is called?