Homework Answers
Eye color in fruit fly is X linked. Here genotype of heterozygous individual will be XRXr and genotype of white eyed individual will be XrY.
a)XRXr-heterozygous, XrY-white eyed
b)50%.
The cross will be as, XRXr × XrY --> [(XR),(Xr)] ×[ (Xr),(Y)] -->XRXr-red,XrY-white,XRY-red,XrXr-white.
So 2 out of 4 are white ,so 50%.
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could someone help me figure out how to do these
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Answer Choices:
A) No
B) More information is needed to determine eye color
C) Yes
! Required information Fruit flies normally have red eyes. Seven different true-breeding strains of fly with white eyes have been identified (A-G). In each strain, the white eye trait is due to an autosomal recessive allele. It is possible all seven strains have mutations in the same gene. Alternatively, they may have mutations in different genes. To determine how many genes are involved in eye...
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2. Some biology students were checking the eye color for a large number of fruit flies. For the individual fly, suppose that the probability of white eyes is 25 and the probability of red eyes is .75, and that we may treat these flies as independent Bernoulli trials. Suppose that the biology students check the eyes of fruit flies until the third white-eyed fruit fly is observed. (a) What is the probability of observing third white-eyed fruit fly on the...
2. A white eyed female fly (w is a recessive allele of a gene for eye pigmentation on the X chromosome) is crossed with a red eyed male fly. a. Give the genotypes for the parental generation. b. Give the phenotypes and genotypes, and their proportions, for the F1 generation. c.Fls are crossed to one another. Give the phenotypes and genotypes, and their proportions, for the F2 generation.
could someone help me figure out how to do these
pleaseeee
A female fruit fly who is heterozygous with the phenotype gray body, red eyes & long wings is crossed with a male who is homozygous recessive (black body, purple eyes, vestigial wings). The observed offspring are shown below: # offspring, body color. eye color. wing length 411 gray red long 61 gray red vestigial 2 gray purple long 30 gray purple vestigial 28 black red long black red vestigial...
Required information Fruit flies normally have red eyes. Seven different true-breeding strains of fly with white eyes have been identified (A-G). In each strain, the white eye trait is due to an autosomal recessive allele. It is possible all seven strains have mutations in the same gene. Alternatively, they may have mutations in different genes. To determine how many genes are involved in eye color in these flies, pair-wise crosses are performed between each strain. The offspring phenotypes resulting from...
can someone verify this?
In Drosophila, alternate alleles of an X chromosome gene, white, determine red eyes (w') and white eyes (w). Alternate alleles of a second X chromosome gene, yellow, determine brown body ) and yellow body (). In cross series A and B, the F1 females are heterozygous for both genes, but the arrangement of alleles in the parental generation is different in each case. Study the genotypes and phenotypes of the P, F1, and F2 flies in...
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Answer Choices:
A) No
B) More information is needed to determine eye color
C) Yes
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