Biology, 31.10.2020 04:00 zianebonankenotdbev

The inheritance of short wings in Drosophila fruit flies is an x-linked, recessive trait. Which would
most likely result if a short-winged female mates
with a long-winged male?
Half of the males and females will be short-winged, and half will be long winged
All offspring will be short-winged
All females will be short-winged, and all males will be long-winged
O All females will be longed-winged, all of the males will be short-winged

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step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.

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They don’t store and transmit heredity

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The inheritance of short wings in Drosophila fruit flies is an x-linked, recessive trait. Which wou...

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