Biology, 11.01.2021 02:30, maybellforever120215
Drosophila fruit flies are often used as model organisms in genetic research. In Drosophila, eye color is
determined by genes on the sex chromosomes, and red eyes (W) are dominant to white eyes (w). Figure 1
shows an example of Drosophila sex chromosomes with alleles for eye color. Figure 2 is a pedigree showing
the inheritance of eye color in Drosophila over four generations. Figure 3 is a Punnett square depicting a cross
between two fruit flies.
A Based on Figure 1, describe a difference between a Y chromosome and an X chromosome.
B. In Figure 1, both the female and the male have one recessive allele, Predict whether the female and
male will express the same trait and justify your claim using evidence from Figure 1.
C. Based on Figure 2, describe the pattern in a pedigree for an X-linked recessive trait.
D. Based on Figure 3, explain why all male offspring are white-eyed and all female offspring are red-eyed.
Answers: 2
Biology, 21.06.2019 15:00, alexisolsennn4680
In familial hypercholesterolemia individuals homozygous for the allele causing the disorder completely lack receptors on liver cells that take up cholesterol from the blood stream. heterozygous have one-half the number of receptors while individuals homozygous for the normal allele are phenotypically normal. this is an example of a. epistasis b. complete dominance c. incomplete dominance d. codominance
Answers: 2
Biology, 22.06.2019 03:00, do1213
Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils
Answers: 2
Biology, 22.06.2019 13:00, dianelys3083p5spb5
Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?
Answers: 3
Drosophila fruit flies are often used as model organisms in genetic research. In Drosophila, eye col...
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