Assume That You Are Told That a Particular Organism,Drosophila,has the XO

question 34

Multiple Choice

Assume that you are told that a particular organism,Drosophila,has the XO chromosome complement.You are also told that the autosomal complement is a normal 2n.You know that in humans the XO complement is female determining.Would you be correct in assuming that the Drosophila sex for XO is also female? Choose the answer that includes the correct explanation.

• A)No,the chromosomal basis for sex determination in Drosophila is based on the balance between the number of X chromosomes and haploid sets of autosomes.
• B)Yes,because sex determination in humans and insects is essentially the same.
• C)Yes,the presence of an X chromosome determines a female in both organisms.
• D)No,sex determination in Drosophila is dependent on the presence or absence of the Y chromosome.
• E)No,it takes two X chromosomes to produce a female in humans and a Y chromosome to produce a male in Drosophila.

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