Homework Answers
Ans. Short bristles are dominant to long bristles. [ As in Cross 1 all progenies have short bristles]
The bristle length gene is X-linked. [ even one gene controlling the short bristle length is able to express itself, so the male flies carrying that X-chromosome show the short bristle phenotype].
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Several crosses were made between female fruit flies with yellow bodies and short bristles and male...
We crossed pure-bred female flies with yellow body and forked-shaped bristles with male flies extra bristles....
We crossed pure-bred female flies with yellow body and
forked-shaped bristles with male flies extra bristles. The
subsequent F1 flies showed all normal phenotypes except that all of
the F1 males are yellow-body. We crossed again the normal F1
females with males homozygous for yellow body, extra bristles, and
forked bristles as a testcross. The number of each category of F2
progeny is shown below. The mutant allele for yellow body is y; the
mutant allele for extra bristles is...
GENETICS: please help explain the following question. Will give a thumbs up if given the correct...
GENETICS: please help explain the following question. Will give
a thumbs up if given the correct information.
z mutation of the ellow (zeste) 11. The partially recessive, X-linked Drosophila gene zeste (z) can produce a yellow eye color only in flies that have two or more the wild-type white (w) gene. Using this tandem duplications of the w" gene called property identified. Males with the genotype z wtRy t zeste ey the genotype y zl VV spl/),t ?? w+R spl+....
The genes for sepia eye color, short bristles, and dark body coloration are on the same...
The genes for sepia eye color, short bristles, and dark body coloration are on the same chromosome of Drosophila melanogaster. Each gene has two alleles: wild type, which is dominant, or mutant, which is recessive. se+ is dominant and causes red eyes; se is recessive and causes sepia eyes sb+ is dominant and causes long bristles; sb is recessive and causes short bristles b+ is dominant and causes gray body coloration; b is recessive and causes dark...
You begin working in a genetics lab that uses Drosophila and find that a previous student...
You begin working in a genetics lab that uses Drosophila and
find that a previous student has left behind a bottle of flies that
have a yellow (instead of brown) body with no information about the
mutation that leads to the yellow body color. You first determine
that these flies are true breeding, and then set up some crosses.
Cross 1: You cross yellow females with true breeding wild type
males. In the F1s, all of the females have brown...
6. In Cross 1, a yellow eyed, long wing fruit fly from a pure breeding strain...
6. In Cross 1, a yellow eyed, long wing fruit fly from a pure breeding strain is mated to a red eye, short wing fruit fly from a pure breeding strain. All of their offspring (F1) had red eyes and long wings. In Cross 2, one of the F1 offspring is mated to a fly with yellow eyes and short wings, and this cross gave the following F2 population: 194 flies with long wings and red eyes, 796 flies with...
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...
genetics: sorted independently and completely linked Analyze the following fruit fly cross. In this cross there...
genetics: sorted independently and completely linked
Analyze the following fruit fly cross. In this cross there are two autosomal traits that are influenced by two distinct genes and the F2 generation came from crossing an F1 male with an F1 female. P: true breeding grey eyed; brown bodied males x true breeding red eyed; black bodied females F1: all offspring are red eyed; brown bodied F2: ? When the Fy flies are allowed to self cross, what percentage of F2...
A lab discovers a recessive mutation in fruit flies that makes them appear hairy, and they...
A lab discovers a recessive mutation in fruit flies that makes them appear hairy, and they breed a true-breeding line of flies with this mutation. A different lab independently identifies a recessive mutation that causes hairy flies. What experiment, and what results, would lead you to conclude that the two mutations occur in the same gene? What results would lead you to conclude that the two mutations occur in two different genes? A 3rd lab independently discovers a mutant that...
genetics Analyze the following fruit fly cross. In this cross there are two autosomal traits that...
genetics
Analyze the following fruit fly cross. In this cross there are two autosomal traits that are influenced by two distinct genes and the F2 generation came from crossing an F1 male with an F1 female. P: true breeding grey eyed; brown bodied males x true breeding red eyed; black bodied females F1: all offspring are red eyed; brown bodied F2: ? When the F1 flies are allowed to self cross, what percentage of F2 flies will have both brown...
Question 4 (1 point) Continue Consider a mating between a single F2 male that is phenotypically...
Question 4 (1 point) Continue Consider a mating between a single F2 male that is phenotypically wild-type (i.e., red eyes and tan body) and a single, phenotypically wild-type F2 female. What is the probability that ALL of the resulting F3 progeny will be true breeding and have red eyes and tan bodies? 1/6 01/12 1/256 1/36 1/8 1/64 1/18 1/32 Question 3 (1 point) Saved In flies (Drosophila), loss of function mutations in the X-linked white gene cause a recessive...
We crossed pure-bred female flies with yellow body and
forked-shaped bristles with male flies extra bristles. The
subsequent F1 flies showed all normal phenotypes except that all of
the F1 males are yellow-body. We crossed again the normal F1
females with males homozygous for yellow body, extra bristles, and
forked bristles as a testcross. The number of each category of F2
progeny is shown below. The mutant allele for yellow body is y; the
mutant allele for extra bristles is...
GENETICS: please help explain the following question. Will give
a thumbs up if given the correct information.
z mutation of the ellow (zeste) 11. The partially recessive, X-linked Drosophila gene zeste (z) can produce a yellow eye color only in flies that have two or more the wild-type white (w) gene. Using this tandem duplications of the w" gene called property identified. Males with the genotype z wtRy t zeste ey the genotype y zl VV spl/),t ?? w+R spl+....
You begin working in a genetics lab that uses Drosophila and
find that a previous student has left behind a bottle of flies that
have a yellow (instead of brown) body with no information about the
mutation that leads to the yellow body color. You first determine
that these flies are true breeding, and then set up some crosses.
Cross 1: You cross yellow females with true breeding wild type
males. In the F1s, all of the females have brown...
6. In Cross 1, a yellow eyed, long wing fruit fly from a pure breeding strain is mated to a red eye, short wing fruit fly from a pure breeding strain. All of their offspring (F1) had red eyes and long wings. In Cross 2, one of the F1 offspring is mated to a fly with yellow eyes and short wings, and this cross gave the following F2 population: 194 flies with long wings and red eyes, 796 flies with...
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...
genetics: sorted independently and completely linked
Analyze the following fruit fly cross. In this cross there are two autosomal traits that are influenced by two distinct genes and the F2 generation came from crossing an F1 male with an F1 female. P: true breeding grey eyed; brown bodied males x true breeding red eyed; black bodied females F1: all offspring are red eyed; brown bodied F2: ? When the Fy flies are allowed to self cross, what percentage of F2...
genetics
Analyze the following fruit fly cross. In this cross there are two autosomal traits that are influenced by two distinct genes and the F2 generation came from crossing an F1 male with an F1 female. P: true breeding grey eyed; brown bodied males x true breeding red eyed; black bodied females F1: all offspring are red eyed; brown bodied F2: ? When the F1 flies are allowed to self cross, what percentage of F2 flies will have both brown...
Question 4 (1 point) Continue Consider a mating between a single F2 male that is phenotypically wild-type (i.e., red eyes and tan body) and a single, phenotypically wild-type F2 female. What is the probability that ALL of the resulting F3 progeny will be true breeding and have red eyes and tan bodies? 1/6 01/12 1/256 1/36 1/8 1/64 1/18 1/32 Question 3 (1 point) Saved In flies (Drosophila), loss of function mutations in the X-linked white gene cause a recessive...
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