White eyed flies = XwXw, XwY
Red eyed flies = XX, XwX, XY
XwXw (white eyed female) × XY (red eyed male)
Gametes | Xw |
X | XwX red eyed female |
Y | XwY white eyed male |
In this cross, there will be no female with red eyes. So, answer is 0.
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Fruit flies normally have dull red eyes. Some fruit flies have white eyes due to mutation...
Fruit flies normally have dull red eyes. Some fruit flies have white eyes due to a mutation in a gene on the X-chromosome. The white eyed phenotype is X-linked recessive. The sex chromosomes in fruit flies are: females, normally XX; males, normally XY. If a red-eyed female who is a carrier of the white eyed allele (normal or wild-type phenotype) mates with a white-eyed male (mutant phenotype), what is the likelihood that their male offspring will have red eyes? Parents:...
Fruit flies normally have dull red eyes. Some fruit flies have white eyes due to a mutation in a gene on the X-chromosome. The white eyed phenotype is X-linked recessive. The sex chromosomes in fruit flies are: females, normally XX; males, normally XY. If a true breeding red-eyed female (normal or wild-type phenotype) mates with a white- eyed male (mutant phenotype), what is the likelihood that their male offspring will have white eyes? Parents: red-eyed female X white-eyed male Select...
Birds normally have dull red eyes. Some birds have white eyes due to a mutation in a gene on the X-chromosome. The white eyed phenotype is X-linked recessive. The sex chromosomes in birds are: females, normally XX; males, normally XY. Part 1) If a red-eyed female who is a carrier of the white eyed allele (normal or wild-type phenotype) mates with a white-eyed male (mutant phenotype), what is the likelihood that their male offspring will have red eyes? Parents: red-eyed...
29, In fruit flies, red eyes are dominant over white eyes. The gene for eye color (R) is found on the X chromosome (X^R). Females have 2 X chromosomes and males are XY. Fill in the following (case sensitive!): Genotype of a white eyed female: Possible female gametes; separate gametes with a comma (,): Genotype of a red eyed male: Possible male gametes; separate gametes with a comma (,): In fruit flies, red eyes are dominant over white eyes. The...
Some fruit flies have an autosomal mutation that causes the recessive white-eyes to appear compared to the wild-type (dominant) red eyes, while others have an X-linked mutation that causes the same varieties. You are presented with two populations of flies in unmarked tubes: one that has the autosomal white-eye mutation, and a population that has the X-linked mutation for white-eye. Assuming you have separated the pure breeding red and white-eyed parents in each population, What is the set of two...
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...
A white eyes female fruit fly is mated to a red eyed (wild type) male. While most of their progeny are as expected, occasionally a white eyed female is produced due to nondisjunction in the female. What is the likely karyotype of this white eyed daughter? (assume all fruit flies have AA as autosomes)!! (Please explain :) ) A) XX B) XXY C) XO D) XXX Y) XYY
In Drosophila, the X-linked recessive mutation vermillion (v) causes bright red eyes, in contrast to the brick-red eyes caused by the wild-type allele. A separate autosomal recessive mutation, brown (bw), causes flies to have brown eyes. Flies carrying both mutations have no eye pigmentation and are white-eyed. Determine the F1 and F2 phenotypic ratios for each sex from the following crosses: (a) brown females X vermillion males (b) white-eyed females X wild-type males
In Drosophila, the X-linked recessive mutation vermilion (XV) causes bright red eyes, in contrast to the brick-red eyes of wild type (X+). Part A separate autosomal recessive mutation (br), causes the eyes to be brown. Predict the F1 results of the following cross: normal females x white males. (Assume that the parents are homozygous.) Flies carrying both mutations lose all pigmentation and are white-eyed. Label the diagram by dragging the labels to the appropriate targets. Note: not all labels will...
Female fruit flies typically have two X chromosomes; male fruit flies typically have one X and one Y chromosome. They have other chromosomes too that are NOT sex chromosomes. Suppose there is a gene in fruit flies that influences the hairs a fly has on its thorax (the middle section of its body). A recessive allele of this gene causes the hairs to be very thick, while a dominant allele causes the hairs to be very thin. Suppose a heterozygous...