Homework Answers
Here no double crossover will occur. For double crossover atleast there genes are needed but two genes (w and y) are present here. So, none of the above is the correct alternative here.
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- Xuestions 3-6 A cross between a female fly which is wy/wtyt and a wy/Y male....
6. What is the distance between the w and y genes? a. .16 mu5.1% b. .92...
6. What is the distance between the w and y genes? a. .16 mu5.1% b. .92 mu c..983 mu d. 5.08 mu TOLL For Questions 3-6 A cross between a female fly which is wy/wty+ and a wy/Y male. The male offspring an wy/Y - 3000 wty/Y - 2900 wty/Y - 50 wy/Y - 50
You make cross between a male fruit fly with wrinkled wings and a female fly with...
You make cross between a male fruit fly with wrinkled wings and a female fly with vestigial wings. All of the F1 flies are have wrinkled wings. A cross between an F1 female fly and an F1 male fly yields the following offspring: 45 wrinkled-wing males 51 wrinkled-wing females 18 vestigial-wing males 14 vestigial-wing females What do you hypothesize as the mode of inheritance for this trait?
4. Now, assume that a F1 male and a F1 female offspring produced by the cross...
4. Now, assume that a F1 male and a F1 female offspring produced by the cross in #3 above mate with each other. F1 offspring : XXGgBb and XYGgBb Note: You can ignore the X and Y chromosomes here in question 4. Why? The traits of interest (fire-breathing and laser-shooting) are autosomal, so the sex of the fly (XX=female or XY=male) will not impact the trait expressed. You only need to follow the inheritance of chromosomes 2 and 3 for...
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...
4.3-4. The gene for eye color in a certain male fruit fly has alleles (R, W)....
4.3-4. The gene for eye color in a certain male fruit fly has alleles (R, W). The gene for eye color in the mating female fruit fly also has alleles (R, W). Their offspring receive one allele for eye color from each parent. If an offspring ends up with either (R, R), (R, W), or (W, R), its eyes will look red. Let X equal the number of offspring having red eyes. Let Y equal the number of red-eyed offspring...
Dance fly females form swarms in which several dozen individuals gather together to fly about in...
Dance fly females form swarms in which several dozen individuals gather together to fly about in circles. When a male dance fly enters the swarm, females inflate their abdomens and move toward the male, who carefully selects one of the many females as his partner. Given this information and based solely on the parental investment theory by Robert Trivers, which of the following predictions would you make? Select one: a. Female dance flies should receive direct benefits from the male...
3) Dihybrid cross: The dark-bodied and rudimentary winged genes are on two different autosomal chromosomes. We...
3) Dihybrid cross: The dark-bodied and rudimentary winged genes are on two different autosomal chromosomes. We will use this cross to determine the ratios of phenotypes in the F2 generation when there are two genes involved. 3.1) Use the following symbols to write out the cross: Male: 3 Female: 9 Dark body color (ebony) = e Wild-type body color: E or E+ Rudimentary wings- (vestigial wings= v) Wild-type wings: V or V+ 3.2) What would the cross look like if...
im not sure how to calcualte the double crossover offspring A cross in Drosophila involved the...
im not sure how to calcualte the double crossover
offspring
A cross in Drosophila involved the recessive, X-linked genes yollow (y), white (w), and cut (ch). A yellow-bodied, white-eyed female with normal wings was crossed to a male whose eyes and body were normal but whose wings were cut • The F, females were wild type for all three traits. The F, males expressed the yellow-body and white-eye traits. The cross was carried to an F2 progeny, and only male...
20. A "zony" is a cross between a female pony (2n=64) and a male zebra (2n...
20. A "zony" is a cross between a female pony (2n=64) and a male zebra (2n = 44). Zonies are and have a normal lifespan but the different number of chromosomes between the two parent species means they are unable to produce offspring of their own. Zonies are an example of: hybrid inviability hybrid sterility hybrid breakdown autopolyploidy meiotic error 21. Which of the following would best be described as a case of speciation in sympatry? a. A population of...
3) Dihybrid cross: The dark-bodied and rudimentary winged genes are on two different autosomal chromosomes. We...
3) Dihybrid cross: The dark-bodied and rudimentary winged genes are on two different autosomal chromosomes. We will use this cross to determine the ratios of phenotypes in the F2 generation when there are two genes involved. 3.1) Use the following symbols to write out the cross: Male: Female: 0 Dark body color (ebony) = Wild-type body color: E or E+ Rudimentary wings- (vestigial wings= v) Wild-type wings: V or V+ 3.2) What would the cross look like if we mated...
6. What is the distance between the w and y genes? a. .16 mu5.1% b. .92 mu c..983 mu d. 5.08 mu TOLL For Questions 3-6 A cross between a female fly which is wy/wty+ and a wy/Y male. The male offspring an wy/Y - 3000 wty/Y - 2900 wty/Y - 50 wy/Y - 50
4. Now, assume that a F1 male and a F1 female offspring produced by the cross in #3 above mate with each other. F1 offspring : XXGgBb and XYGgBb Note: You can ignore the X and Y chromosomes here in question 4. Why? The traits of interest (fire-breathing and laser-shooting) are autosomal, so the sex of the fly (XX=female or XY=male) will not impact the trait expressed. You only need to follow the inheritance of chromosomes 2 and 3 for...
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...
3) Dihybrid cross: The dark-bodied and rudimentary winged genes are on two different autosomal chromosomes. We will use this cross to determine the ratios of phenotypes in the F2 generation when there are two genes involved. 3.1) Use the following symbols to write out the cross: Male: 3 Female: 9 Dark body color (ebony) = e Wild-type body color: E or E+ Rudimentary wings- (vestigial wings= v) Wild-type wings: V or V+ 3.2) What would the cross look like if...
im not sure how to calcualte the double crossover
offspring
A cross in Drosophila involved the recessive, X-linked genes yollow (y), white (w), and cut (ch). A yellow-bodied, white-eyed female with normal wings was crossed to a male whose eyes and body were normal but whose wings were cut • The F, females were wild type for all three traits. The F, males expressed the yellow-body and white-eye traits. The cross was carried to an F2 progeny, and only male...
20. A "zony" is a cross between a female pony (2n=64) and a male zebra (2n = 44). Zonies are and have a normal lifespan but the different number of chromosomes between the two parent species means they are unable to produce offspring of their own. Zonies are an example of: hybrid inviability hybrid sterility hybrid breakdown autopolyploidy meiotic error 21. Which of the following would best be described as a case of speciation in sympatry? a. A population of...
3) Dihybrid cross: The dark-bodied and rudimentary winged genes are on two different autosomal chromosomes. We will use this cross to determine the ratios of phenotypes in the F2 generation when there are two genes involved. 3.1) Use the following symbols to write out the cross: Male: Female: 0 Dark body color (ebony) = Wild-type body color: E or E+ Rudimentary wings- (vestigial wings= v) Wild-type wings: V or V+ 3.2) What would the cross look like if we mated...
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