Answer:
ppss and PPSS
Explanation:
Just as indicated in the question above, Flies homozygous for singed and purple were crossed with flies that were homozygous for normal bristles and red eyes.
And a Drosophila mutation called singed (s) causes the bristles to be bent and misshapen.
A mutation called purple (p) causes the fly’s eyes to be purple in color instead of the normal red.
Thus, the genotypes of the parental flies in Cross 1 are
PPSS and ppss
Explanation:
2) E) ribosome .
3) c) cytoskeleton: The cytoskeleton is a series of fibers made from proteins. It provides structure to the cell and gives it its shape it its shape.
4) a) chloroplast
Answer:
directional selection, is a mode of negative natural selection in which an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype.
I think that the number of spiders in the house will decrease because spiders like cooler air and they usually come in houses in the spring because it is hot out.
Hope this helps... mark as Brainliest plz
Ok, so a hypothesis is an educated guess. When conducting an experiment, scientists test their hypothesis. And if their hypothesis is correct, it becomes a theory.
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I hope this H
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