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B. Geneticists have discovered that some flies have white eyes and others red eyes. The difference...
29, In fruit flies, red eyes are dominant over white eyes. The gene for eye color...
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...
Fruit flies normally have dull red eyes. Some fruit flies have white eyes due to a...
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 mutation...
Fruit flies normally have dull red eyes. Some fruit flies have white eyes due to 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 white-eyed female (mutant phenotype) mates with a red-eyed male (normal or wild- type phenotype), what is the likelihood that their female offspring will have red eyes? Parents: white-eyed female X red-eyed male Select one: a. O...
Fruit flies normally have dull red eyes. Some fruit flies have white eyes due to a...
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...
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...
A (w-/ w-) white-eyed Drosophila female is crossed with a red-eyed male. Assuming the trait for...
A (w-/ w-) white-eyed Drosophila female is crossed with a red-eyed male. Assuming the trait for eye color is sex-linked, what are the possible phenotypes of the progeny? All red-eyed individuals Red- and white-eyed females and males Only red-eyed females and white-eyed males Both red- and white-eyed males and only white-eyed females None of these
A cross was made between a male fruit fly with purple eyes and two different female...
A cross was made between a male fruit fly with purple eyes and two different female flies with red eyes. The first female produced 41 progeny that all had red eyes, whereas the second female produced 18 progeny with red eyes and 21 progeny with purple eyes. a. Diagram the two crosses in words (you don't need to show the genotypes yet). b. Which eye color is dominant and which is recessive? How do you know? c. Choose a symbol...
The following Drosophila crosses were performed Cross 1 Parents: white-eyed straight winged male x red-eyed; curly...
The following Drosophila crosses were performed Cross 1 Parents: white-eyed straight winged male x red-eyed; curly winged female Progeny: all red-eyed flies, half of which are curly winged Cross 2 (reciprocal cross) Parents: red-eyed curly winged male x white-eyed straight winged female Progeny: white-eyed males and red-eyed females, half of each have curly wings. Test crosses with the curly winged progeny from cross 1 and 2 to homozygous straight winged flies resulted in all half curly and half straight winged...
Experimental technique: Reciprocal crosses
1)When Gregor Mendel conducted his genetic experiments with pea plants, he observed that a trait’s inheritance pattern was the same regardless of whether the trait was inherited from the maternal or paternal parent. Mendel made these observations by carrying out reciprocal crosses: For example, he first crossed a female plant homozygous for yellow seeds with a male plant homozygous for green seeds and then crossed a female plant homozygous for green seeds with a male plant homozygous for yellow seeds.Unlike...
In Drosophila, the X-linked recessive mutation vermilion (XV) causes bright red eyes, in contrast to the...
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...
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 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 white-eyed female (mutant phenotype) mates with a red-eyed male (normal or wild- type phenotype), what is the likelihood that their female offspring will have red eyes? Parents: white-eyed female X red-eyed male Select one: a. O...
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...
A cross was made between a male fruit fly with purple eyes and two different female flies with red eyes. The first female produced 41 progeny that all had red eyes, whereas the second female produced 18 progeny with red eyes and 21 progeny with purple eyes. a. Diagram the two crosses in words (you don't need to show the genotypes yet). b. Which eye color is dominant and which is recessive? How do you know? c. Choose a symbol...
The following Drosophila crosses were performed Cross 1 Parents: white-eyed straight winged male x red-eyed; curly winged female Progeny: all red-eyed flies, half of which are curly winged Cross 2 (reciprocal cross) Parents: red-eyed curly winged male x white-eyed straight winged female Progeny: white-eyed males and red-eyed females, half of each have curly wings. Test crosses with the curly winged progeny from cross 1 and 2 to homozygous straight winged flies resulted in all half curly and half straight winged...
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...
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