An X to A ratio of ⅖ in drosophila produces:
Correct answer: C. Male
- A. Sterile female
- B. Fertile female
- C. Male
- D. Both male and female but sterile
Explanation
An X to A ratio of 1.00 or higher produces females whereas an X : A ratio of 0.5 or less produces males. Here the ratio 2/5 or 0.4 is less than 0.5; hence it produces males.
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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.
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