How many alleles does the gene that controls the ABO blood group have?
Correct answer: A. Three
- A. Three
- B. Two
- C. One
- D. Four
Explanation
The blood group system is encoded by a single polymorphic gene present on chromosome number 9. It has three multiple alleles: IA, IB, and i. The first two are dominant while the third one is recessive in nature.
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
Both husband and wife have normal vision though their fathers were color blind. The probability of their daughter becoming color blind is:
Hemophilia is more common in males because it is a:
A person with blood group A will not produce:
A gamete without sex chromosome is called:
Visible genetic traits include which of the following?
In peas, the gene for yellow color (C) is dominant to the gene for green color (c). To determine the genotype of an unknown yellow pea, what kind of pea should you cross with it?