In rats, several independently assorting autosomal genes affect coat color. Gene A controls the distribution of...
In rats, several independently assorting autosomal genes affect coat color. Gene A controls the distribution of yellow pigment in hair, and gene B causes black pigmentation. The two genes interact as follows: A–B– (gray), A–bb (yellow), aaB– (black), and aabb (cream). These genotypes are only expressed in the presence of the dominant allele of a third gene, C; rats with genotype cc are albino.
a. Deduce the genotype of each albino mice, to the extent that is possible, in the following table. Explain your answers.
|
True-breeding parents |
F1 |
F2 offspring |
|
Gray x albino-1 |
All gray |
3/4 gray : 1/4 albino |
|
Gray x albino-2 |
All gray |
9/16 gray : 3/16 yellow : 4/16 albino |
Homework Answers
1. Gray x albino-1
AABBCC x AABBcc ------>AABBCc (F1) due to presence of Cc genotype all will be gray.
When this gray F1 is self crossed, other genes being dominant the cross between alleles of c gene will be Cc x Cc ----> 1CC:2Cc:1cc genotype and 3:1 phenotype, where 3 is gray and 1 is albino. So, genotype of albino mice here will be AABBcc.
2. Gray x albino-2
AABBCC x AaBbcc----->16 AABBCc: 16 AABbCc: 16 AaBBCc: 16 AaBbCc
All genotypes have A_B_C_ combination so all are gray in F1.
Now, If we take the genetic combination AABbCc that is one of the gray allele in the F1 population, and self cross it, we will find following results:
AABbCc x AABbCc-----> 1 AABBCC: 2 AABBCc: 1 AABBcc: 2 AABbCC: 4 AABbCc : 2 AABbcc: 1 AAbbCC : 2 AAbbCc: 1 AAbbcc (genotype) which is equal to the phenotype 9:3:4
Phenotype- 9 gray: 3 yellow: 4 albino according to the genetic combinations of Colors given in the question.
Add Answer to:
In rats, several independently assorting autosomal genes affect
coat color. Gene A controls the distribution of...
1) Coat color in mice is determined by several independently assorting autosomal genes. Gene A is...
1) Coat color in mice is determined by several independently assorting autosomal genes. Gene A is involved in the distribution of pigment along the hair. A dominant allele (A) produces a hair color called "agouti"--the hair has dark pigment at the base and tip of each hair shaft and yellow pigment in the central portion of the shaft. Homozygous recessive mice (aa) are missing the yellow stripe and thus have solid dark-colored hair. Gene B is involved in the color...
1. At least 3 independently assorting loci are known to govern coat color in mice. The...
1. At least 3 independently assorting loci are known to govern coat color in mice. The genotype C- will allow pigment to be produced by 2 other genes. The cc genotype does not allow pigment production resulting in albino mice. The striped “agouti” hair pattern depends on the genotype A- and the aa genotype is nonagouti. Finally, the color of the pigment may be black (B-) or brown (bb). Five different coat colors may be produced by the action of...
In rats, at least 2 different genes interact to determine hair color. The allele A causes...
In rats, at least 2 different genes interact to determine hair color. The allele A causes a yellow-colored coat and the allele R produces a black coat. If both dominant alleles are present (genotype A-R) the rats are gray, and if none are present (aarr) the rats are cream-colored. a. If two heterozygous gray rats are mated and have 16 babies, show the expected number of babies of each color. b. If a heterozygous gray rat is mated with cream-colored...
19. Two different gene loci are responsible for determining mouse coat color. A recessive lethal allele...
19. Two different gene loci are responsible for determining mouse coat color. A recessive lethal allele contributing to yellow coat color also exists for one of these two gene loci. The following genotypic and phenotypic information about the mouse coat color alleles is known: (6) Agouti = A-B- • Yellow = AA'B-or A'aB-or A'ab- Lethal (inviable zygote) = A'A- Black = aaB- Albino = -bb a. A cross is made that produces 2 yellow, 1 black, and 3 albino mice....
Genes A and B assort independently. Match the following genotypes with the correct gamete combinations that...
Genes A and B assort independently. Match the following genotypes with the correct gamete combinations that the given genotype can produce. - : AABb A. Two, AB and aB - AaBB B. Four, AB, Ab, ab, and ab - : AaBb C. One, a - 1 aaBB D. Two, AB and Ab Coat color in mice can be agouti, albino, or black and is controlled by two genes that assort independently. Agouti color results when at least one dominant A...
7) In Labrador retrievers, 2 independently assorting genes interact to generate coat color (B, b and...
7) In Labrador retrievers, 2 independently assorting genes interact to generate coat color (B, b and E, e). The genotype B_E_ results in black coat; bbE_ results in chocolate coats; B_ee results in yellow coat; and bbee results in yellow coat. If you were a breeder, you might be especially interested in producing black and brown labs, since they might fetch the most money when sold. What proportion of these two phenotypes would you expect from the following crosses? a)...
1. Let's say an individual is of the genotype AABbCcDdEe. a) How many different gamete types...
1. Let's say an individual is of the genotype AABbCcDdEe. a) How many different gamete types could he/she produce for could he/she produce for these traits ? another of the same genotype, what proportion of their b) If this individual were to mate with another of the same genotype, offspring would we expect to show all 5 of the dominant phenotypes expect to show all 5 of the dominant phenotypes? How about all 5 of the recessive phenotypes ? c)...
is In guinea pigs, black coat color (B) is dominant to white (b), and rough color...
is In guinea pigs, black coat color (B) is dominant to white (b), and rough color (R) dominant to smooth (o). What following crosses a) BBRR x bbrr b) BBrr x bbRR c) Bbrr x bbRr d) BBRr x BbRr e) BbRr x BbRr 2)The presence of one of the Rh antigens on the surface of the red blood cells (Rh+) in humans is produced by a dominant gene R. Th negative cells are produced by the recessive genotype rr....
1. In cats, two unlinked genes control coat coloration: D, an autosomal gene, causes fur to...
1. In cats, two unlinked genes control coat coloration: D, an autosomal gene, causes fur to be black (D/-) or brown (d/d). Black is the wildtype and brown is caused by a mutation E, an X-linked gene, causes white fur and is dominantly epistatic to D. (Write as XE or Xe). A pure-breeding white male cat is mated with a pure-breeding brown female cat. A. What are the genotypes of the parents? what phenotypic ratio is expected in the F17(Rem...
One-Gene Crosses 1. In Drosophila, gray body color is dominant over black body color. By crossing...
One-Gene Crosses 1. In Drosophila, gray body color is dominant over black body color. By crossing a heterozygous gray-bodied fly with a black-bodied fly, one hundred offspring resulted. How many would be expected to have black bodies? 7 2. Albinism, the lack of pigment, occurs commonly in animals and is always recessive to normal pigmentation. Ten brown and eight albino mice were born to parents which were likewise brown and albino. What are the genotypes of both parents? 3. The...
1. At least 3 independently assorting loci are known to govern coat color in mice. The genotype C- will allow pigment to be produced by 2 other genes. The cc genotype does not allow pigment production resulting in albino mice. The striped “agouti” hair pattern depends on the genotype A- and the aa genotype is nonagouti. Finally, the color of the pigment may be black (B-) or brown (bb). Five different coat colors may be produced by the action of...
19. Two different gene loci are responsible for determining mouse coat color. A recessive lethal allele contributing to yellow coat color also exists for one of these two gene loci. The following genotypic and phenotypic information about the mouse coat color alleles is known: (6) Agouti = A-B- • Yellow = AA'B-or A'aB-or A'ab- Lethal (inviable zygote) = A'A- Black = aaB- Albino = -bb a. A cross is made that produces 2 yellow, 1 black, and 3 albino mice....
Genes A and B assort independently. Match the following genotypes with the correct gamete combinations that the given genotype can produce. - : AABb A. Two, AB and aB - AaBB B. Four, AB, Ab, ab, and ab - : AaBb C. One, a - 1 aaBB D. Two, AB and Ab Coat color in mice can be agouti, albino, or black and is controlled by two genes that assort independently. Agouti color results when at least one dominant A...
1. Let's say an individual is of the genotype AABbCcDdEe. a) How many different gamete types could he/she produce for could he/she produce for these traits ? another of the same genotype, what proportion of their b) If this individual were to mate with another of the same genotype, offspring would we expect to show all 5 of the dominant phenotypes expect to show all 5 of the dominant phenotypes? How about all 5 of the recessive phenotypes ? c)...
is In guinea pigs, black coat color (B) is dominant to white (b), and rough color (R) dominant to smooth (o). What following crosses a) BBRR x bbrr b) BBrr x bbRR c) Bbrr x bbRr d) BBRr x BbRr e) BbRr x BbRr 2)The presence of one of the Rh antigens on the surface of the red blood cells (Rh+) in humans is produced by a dominant gene R. Th negative cells are produced by the recessive genotype rr....
1. In cats, two unlinked genes control coat coloration: D, an autosomal gene, causes fur to be black (D/-) or brown (d/d). Black is the wildtype and brown is caused by a mutation E, an X-linked gene, causes white fur and is dominantly epistatic to D. (Write as XE or Xe). A pure-breeding white male cat is mated with a pure-breeding brown female cat. A. What are the genotypes of the parents? what phenotypic ratio is expected in the F17(Rem...
One-Gene Crosses 1. In Drosophila, gray body color is dominant over black body color. By crossing a heterozygous gray-bodied fly with a black-bodied fly, one hundred offspring resulted. How many would be expected to have black bodies? 7 2. Albinism, the lack of pigment, occurs commonly in animals and is always recessive to normal pigmentation. Ten brown and eight albino mice were born to parents which were likewise brown and albino. What are the genotypes of both parents? 3. The...
Most questions answered within 3 hours.
-
3) What are the typical social structures in a global city?
asked 57 minutes ago -
Luther Corporation
Consolidated Balance Sheet
December 31, 2019 and 2018 (in $ millions)
Assets
2019
2018...
asked 59 minutes ago -
(Expected rate of return and risk) Carter Inc. is evaluating a
security. Calculate the investment’s expected...
asked 3 hours ago -
What specific indicators can point to lack of progress for
African Americans in American society?
asked 4 hours ago -
1-The Electrons in a beam are moving at 2.7×108 m/s in an
electric field of 15000...
asked 4 hours ago -
A gas tank is a vertical cylinder. It has a radius of 1m, a
height of...
asked 5 hours ago -
Accent Software faces the following conditions. All of these
support Accent’s use of a market-penetration pricing...
asked 6 hours ago -
A mathematically inclined friend emails you the following
instructions: "Meet me in the cafeteria the first...
asked 6 hours ago -
A monopoly sells in two countries . The demand curves in the two
countries are p1...
asked 7 hours ago -
A .15kg rubber ball is bounced off a wall. Before hitting the
wall, the ball moves...
asked 8 hours ago -
A manufacturing company preparing to build a new plant is
considering three potential locations for it....
asked 8 hours ago -
B. If compound Y has approximately the same values of solubility
in toluene as compound X,...
asked 8 hours ago