Pick the correct option about Drosophila.
Correct answer: D. Salivary gland cells have giant chromosomes in their nuclei
- A. The Male is larger with a pointed abdomen
- B. The female has sex combs on its front legs
- C. It has a generation time of just eight weeks
- D. Salivary gland cells have giant chromosomes in their nuclei
Explanation
Polytene chromosomes form in the Drosophila giant salivary gland during development by multiple rounds of genome replication without cell division to generate polytene chromosomes containing up to 1000 copies of DNA per chromosome.
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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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