Biology

Biology, 31.08.2019 17:30, lazavionadams81

When flies having a gray body and normal wings were crossed with flies having a black body and vestigial wings, the f2 generation showed a phenotypic ratio of 3: 1, and not 9: 3: 3: 1.
which of the following could be a correct explanation for this ratio?
a- genes for body and wing size were on the same chromosome and inherited together
b- genes for body and wing size assort independently
c- genes for body color and wing size are inherited separately from each parent

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Biology, 04.07.2019 00:00, rakanmadi87

When flies having a gray body and normal wings were crossed with flies having a black body and vestigial wings, the f2 generation showed a phenotypic ratio of 3: 1, and not 9: 3: 3: 1. which of the following could be a correct explanation for this ratio? a. genes for body color and wing size were on the same chromosome and inherited together. b. genes for body color and wing size assort independently. c. genes for body color and wing size are inherited separately from each parent. reset

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Biology, 14.09.2019 01:30, noathequeen

When flies having a gray body and normal wings were crossed with flies having a black body and vestigial wings, the f2 generation showed a phenotypic ratio of 3: 1, and not 9: 3: 3: 1.

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Biology, 02.10.2019 03:30, zoel222

In fruit flies, curved wings are recessive to normal wings, and ebony body is recessive to gray body. a cross was made between two true-breeding flies, one with normal wings and gray body, the other a fly with curved wings and ebony body. the f1 offspring were thus hybrids. these hybrids were crossed to each other (dihybrid cross). for observations, 120 flies were collected. if these traits are independently assorting, what is the expected number of flies with curved wings and gray body

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Biology, 18.10.2019 06:20, lilbanks4

The gene for body color and wing shape reside on the same chromosome in fruit flies. after crossing female flies having gray bodies and normal wings with male flies having black bodies and vestigial wings, morgan observed that some of the f1 flies had nonparental phenotypes (gray bodies with vestigial wings, or black bodies with normal wings). what accounts for this? a. the alleles for wing shape and body color recombined by crossing over.b. some flies with those phenotypes accidentally contaminated the cross.c. the alleles underwent independent assortment during meiosis.d. a certain percentage of the f1 generation was affected by genetic mutations.

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