Of a normal couple, half the sons are hemophiliac while half the daughters are carriers. The gene is located on:
Correct answer: C. one X-chromosome of mother
- A. X-chromosome of father
- B. Y-chromosome of father
- C. one X-chromosome of mother
- D. both the X-chromosomes of mother.
Explanation
The gene is located on one X-chromosomes of mother. Cross between a hemophilic carrier female X h X and normal male would yield 50% of the sons being hemophilic and 50% of the daughter are carriers.
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
Mr. Kapoor has Bb autosomal gene pair and d allele sexlinked. What shall be proportion of Bd in sperms?
The colour blindness is more likely to occur in males than in females because:
A child's blood group is 'O'. The parent's blood groups cannot be:
Two dominant nonallelic genes are 50 map units apart. The linkage is:
A polygenic inheritance in human beings is
Mendel studied inheritance of seven pairs of traits in Pea which can have 21 possible combinations. If you are told that in one of these combinations, independent assortment is not observed in later studies, your reaction will be: