Fruit flies are diploid (2n = 8) and reproduce through oogamy. When there is meiotic cell division in female fruit flies, ___________ egg cell(s) are produced. Each egg cell has ___________ chromosomes. Group of answer choices 1; 4 2; 23 4; 23 4; 4 2; 4 None of these
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The problem states that fruit flies are diploid with 2n = 8. This means they have a total of 8 chromosomes. Show more…
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Fruit flies have a diploid number of 8. How many chromosomes do the somatic cells of an individual fruit fly have? 2, 4, 8, 16, not enough information
Adi S.
Drosophila melanogaster, the fruit fly, has a 2n chromosome number of 8 (4 chromosomes – 3 autosomes and 1 sex chromosome). Assume that you are microscopically examining the mitotic and meiotic cells of this organism. You note that in the female, two chromosomal pairs are metacentric and two pairs are acrocentric. Draw the chromosomal configurations as you would expect to see them at the stages listed: i. mitotic metaphase ii. primary oocyte (meiotic metaphase I) iii. secondary oocyte (meiotic metaphase II) iv. oocyte (gamete G1) v. second polar body. Given that the previously mentioned cells are from an individual heterozygous for two independently segregating, autosomal loci, plum eyes and curled wings, place appropriate symbols (of your designation) on separate chromosomes in the drawings you made for part (a). Assume no crossing over. There may be more than one correct answer. Indicate which allele is the dominant and which is the recessive. (Capital letters are usually used for dominant and lowercase for recessive.) Assuming that a somatic non-dividing nucleus from the individuals mentioned above contains about 8.0 picograms of DNA, how much nuclear DNA would you expect in the oocyte (gamete in G1)?
Josee P.
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