In mice, the A allele causes agouti fur, the AY allele causes yellow fur and is dominant to the A allele. The homozygous AY AY genotype is lethal. Why is the AYAY homozygous condition lethal?
Q: The ABO blood groups in humans are expressed as the I A , I B , and i alleles. The I A allele…
A: Blood is the fluid connective tissue derived from the mesoderm. It is slightly alkaline with a pH of…
Q: In humans, four different blood types (A, B, AB, and O) are encoded by three alleles 1. I. and &…
A: Antibodies and antigens are types of blood proteins that vary from person to person. Antigens are…
Q: In ogres, nose type results from a genetic maternal effect where the autosomal allele for a warty…
A: An autosomal allele is present on the chromosomes other than sex chromosomes.
Q: Polydactly is an autosomal dominant phenotype. In this pedigree, I-2 has one copy of the dominant…
A: Variable expressivity occurs due to the similar genetic condition among different people which…
Q: Miniature wings (Xm) in Drosophila result from an X-linked allele that is recessive to the allele…
A: Alleles are the alternative forms of a gene. Allele can be dominant or recessive.
Q: Mouse fur color is affected by TWO unlinked loci. GG or Gg mice are agouti. Mice with genotype gg…
A: The phenomenon by which the expression of one gene expression is modified by another gene. The…
Q: In the snail Cepaea nemoralis, an autosomal allele causing a banded shell (BB) is recessive to the…
A: Genetic linkage: - when genes are far apart or on the different chromosomes they are said to be…
Q: In Drosophila, singed bristles (sn) and cut wings (ct) are both caused by recessive, X-linked…
A: Introduction :- There are two sets of chromosomes in humans. Allele pairings are categorised using…
Q: In bears fur colour can be either yellow or tan, and is determined by two alleles of the C gene. A…
A: A genetic trait is considered dominant if it is expressed in a person even in its single copy. While…
Q: In the snail Cepaea nemoralis, an autosomal allele causing a banded shell (BB) is recessive to the…
A: Cepaea nemoralis is an air breathing species of land snail and also known as grove snail and brown…
Q: A recessive epistasis cross gives in the F2 a 9:3:4 phenotypic ratio. What is the expected…
A: Epistasis: one gene interferes with the expression of the other gene.
Q: A recessive maternal effect mutant in zebrafish, called ichabod, results in embryos lacking heads…
A: Maternal effect in zebrafish is a situation where the phenotype of an organism is determined not…
Q: In the snail Cepaea nemoralis, an autosomal allele causing a banded shell (BB) is recessive to the…
A: In the question, it is given that a banded, yellow snail is crossed with a homozygous brown,…
Q: In mice, the A allele causes agouti fur, the AY allele causes yellow fur and is dominant to the A…
A: Introduction Certain genes are absolutely essential for the survival of an organism and the allele…
Q: In mice, an allele for apricot eyes (a) is recessive to an allele for brown eyes (a+). At an…
A: Introduction: Mendel has given the law of independent assortment which says that during the transfer…
Q: In humans, the genes for red-green color blindness (R = normal, r = color blind) and hemophilia A (H…
A: Introduction :- A gene or group of genes that causes a single trait or disease is referred to as a…
Q: In the snail Cepaea nemoralis, an autosomal allele causing a banded shell (BB) is recessive to the…
A: Genetic linkage: - when genes are far apart or on the different chromosomes they are said to be…
Q: In aliens, the genes A, B, C, D and E are dominant to their respective alleles a, b, c, d and e:…
A: A dominant allele is one that expresses itself in homozygous as well as heterozygous condition. A…
Q: In ogres nose type results from a genetic maternal effect where the autosomal allele for a warty…
A: It is given that warty nose is dominant over smooth nose. Also given that shekinah with warty…
Q: Tay–Sachs disease is caused by recessive alleles on anautosome. In which case(s) could two parents…
A: Dominant allele is one that always expresses its phenotype. Recessive allele is one that is…
Q: The white Leghorn breed of chickens is homozygous for the dominant allele C, which produces colored…
A: Ans) Homozygous: You inherit the same version of the gene from each parent, so you have two matching…
Q: Bronze coloured turkey is controlled by a dominant allele, B. Red coloured turkey is homozygous for…
A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…
Q: A brown mouse is mated to a white mouse and all of their offspring are brown. Define and assign…
A: INTRODUCTION: WHEN A BROWN MOUSE IS MATED WITH WHITE MOUSE When a brown mouse is mated with white…
Q: The XG locus on the human X chromosome has twoalleles, XG+ and XG. The XG+ allele causes the…
A: Genes that are closely placed in the chromosome, tend to get transferred together in the gametes,…
Q: The fur color gene in rabbits has a dominant allele B with a black phenotype and a recessive allele…
A: According to the mendelian inheritance the genes (that are not linked) shows independent assortment…
Q: In pigs, erect ears is dominant (E) to drooping ears (e). The gene for ear position is autosomal.…
A: The phenotypic characteristics of an organism are determined by the expression of genes. Usually,…
Q: In humans, the genes for coloblindedness and hemophilia re both located on the X chromosome with no…
A: Color blindness can be defined as the type of genetic disorder in which an individual cannot…
Q: Part 2. You perform the cross of the two EeHh rabbits and get the offspring shown below Wild type…
A: The chi-square test is the test done to know whether our data fits in one of the Mendelian ratios.…
Q: The B allele confers black coat color and the b allele brown coat color in Labrador dogs. When…
A: Genes are the functional unit of DNA. It contains information that is transferred from one…
In mice, the A allele causes agouti fur, the AY allele causes yellow fur and is dominant to the A allele. The homozygous AY AY genotype is lethal. Why is the AYAY homozygous condition lethal?
![](/static/compass_v2/shared-icons/check-mark.png)
Step by step
Solved in 2 steps
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
- In mice, the A allele causes agouti fur, the AY allele causes yellow fur and is dominant to the A allele. The homozygous AY AY genotype is lethal. Why is the AYAY homozygous condition lethal? The AY allele highly transcribes the merc gene which is lethal in a homozygous AYAY individual. None of the other answers are correct. The AY allele lacks an upstream merc gene which is required for normal embryonic development. The AY allele contains a null mutation in the A gene, which is required for normal embryonic development. The yellow pigment produced by A allele is required for survival.In crosses between mutant mice, you find the following patterns in the genotype for the A locus containing alleles A1, A2, A3 and A4: What would be the best explanation for the inheritance and why?A recessive epistasis cross gives in the F2 a 9:3:4 phenotypic ratio. What is the expected phenotypic ratio when the F1 (BbEe) is crossed with the double recessive homozygote (bbee)? Keeping in mind ee masks the expression of B.
- Bronze coloured turkey is controlled by a dominant allele, B. Red coloured turkey is homozygous for a recessive allele bb. Dominant gene N produce normal feather and recessive genotype produce ‘hairy’ feather nn. In a cross between homozygous bronzed coloured turkey with ‘hairy’ feather and homozygous red coloured turkey with normal feather. What are the ratios of F2 progeny with Bbnn genotypes? (I want to check if what i'm doing is correct)The fur color gene in rabbits has a dominant allele B with a black phenotype and a recessive allele with a brown phenotype. The rabbit hair length gene has a dominant allele S for short hair, and a long hair recessive allele s. In a cross between a homozygous black-long-hair rabbit with a homozygous brown-short rabbit, what would be the genotype(s) B_s_ v and phenotype(s) [ Select ] of the F1 generation? What would be the genotype(s) [ Select ] and phenotype(s) [ Select ] of the F2 generation?In mice, an allele for apricot eyes (a) is recessive to an allele for brown eyes (a+). At an independently assorting locus, an allele for tan coat color (t) is recessive to an allele for black coat color (t+). A mouse that is homozygous for brown eyes and black coat color is crossed with a mouse having apricot eyes and a tan coat. The resulting F1 are intercrossed to produce the F2. In a litter of eight F2 mice, what is the probability that two will have apricot eyes and tan coats?
- Mouse fur color is affected by TWO unlinked loci. GG or Gg mice are agouti. Mice with genotype gg are albino since all pigment production is blocked, regardless of the phenotype at the second locus. At the other locus, the F allele (agouti coat) is dominant to the f allele (black coat). How many black mice would result from a cross between two agouti mice of genotype GgFf? (just write in the numeral)The white Leghorn breed of chickens is homozygous for the dominant allele C, which produces colored feathers. However, this breed is also homozygous for the dominant allele I of an independently assorting gene that inhibits coloration of the feathers. Consequently, Leghorn chickens have white feathers. The white Wyandotte breed of chickens has neither the allele for color nor the inhibitor of color; it is therefore genotypically cc ii. What are the F2 phenotypes and proportions expected from intercrossing the progeny of a white Leghorn hen and a white Wyandotte rooster?In pigs, erect ears is dominant (E) to drooping ears (e). The gene for ear position is autosomal. A farmer performs a test cross on an erect eared sow (female pig). Explain the purpose of a test cross and describe the other individual involved in the cross.
- In bears fur colour can be either yellow or tan, and is determined by two alleles of the C gene. A heterozygous bear is observed to present a fur pattern of yellow and tan patches. Explain why this can occur.A brown mouse is mated to a white mouse and all of their offspring are brown. Define and assign symbols for the possible alleles. Which allele is dominant?The B allele confers black coat color and the b allele brown coat color in Labrador dogs. When another gene, E, is inherited, the coat is golden no matter what the B phenotype is. A dog of genotype ee expresses the black phenotype. What unusual phenomenon is at work in this disorder?
![Human Heredity: Principles and Issues (MindTap Co…](https://www.bartleby.com/isbn_cover_images/9781305251052/9781305251052_smallCoverImage.gif)
![Human Heredity: Principles and Issues (MindTap Co…](https://www.bartleby.com/isbn_cover_images/9781305251052/9781305251052_smallCoverImage.gif)