Pick out the correct statements. (1) Haemophilia is a sexlinked recessive disease. (2) Down's syndrome is due to aneuploidy. (3) Phenylketonuria is an autosomal recessive gene disorder. (4) Sickle cell anemia is an X-linked recessive gene disorder.
Correct answer: B. (1), (2) and (3) are correct.
- A. (1), (3) and (4) are correct.
- B. (1), (2) and (3) are correct.
- C. (1) and (4) are correct.
- D. (2) and (4) are correct.
Explanation
Sickle-cell anemia is an autosomal recessive genetic disorder. It can be transmitted from parents to the offspring when both partners are carriers of the gene (or heterozygous). Sickle cell anemia is a genetic condition that has an autosomal recessive inheritance pattern. This means that the condition isn't linked to the sex chromosomes. Someone must receive two copies of a recessive allele in order to have the condition.
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
Among the following characters, which one was not considered by Mendel in his experiments on pea?
Haploids are able to express both recessive and dominant alleles/mutations because there are
A family of five daughters is expecting the sixth issue. The chance of it beings a son is
In his classic experiments on pea plants, Mendel did not use
How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments?
Which one of the following symbols and its representation, used in human pedigree analysis is correct?