Concept explainers
To determine: Whether the curl allele is dominant or recessive in the first curl cat.
Concept introduction:
Genes have alternate forms known as alleles, which are transmitted to the offspring. If the offspring receives the same phenotypic traits of the parents, then it is known as true-breeding. If the two alleles are different, then there is a hybrid at F1 generation. The dominant allele out of the two alleles expresses itself and determines the
To obtain: True-breeding curled ear cats and how to be sure that they are true-breeding.
Concept introduction:
Genes have alternate forms known as alleles, which are transmitted to the offspring. If the offspring receives the same phenotypic traits of the parents, then it is known as true-breeding. If the two alleles are different, then there is a hybrid at F1 generation. The dominant allele out of the two alleles expresses itself and determines the phenotype. In F1 individuals, two different alleles segregate into gametes. During self-fertilization, the gametes unite randomly thereby having a chance for recessive allele to be expressed in the homozygous state at F2 generation.
Want to see the full answer?
Check out a sample textbook solutionChapter 14 Solutions
Campbell Biology: Custom Edition
- "In cattle, the allele that causes horns to grow is recessive. Another recessive allele causes the cows to grow abnormally large and muscular. These muscular cows are often called Belgian blue cows. If a cow that is heterozygous for both the horn and Belgian blue trait genes passes on the allele for growing horns to an offspring, what are the odds that the parent cow also passes on the allele for becoming very muscular to that offspring?" I know the answer is 50% but how do I get to this answer?arrow_forwardYou discover a new allele of a gene important for tail formation in mice. WT mice have long tails, but mice heterozygous for the allele have short tails. When you cross two heterozygous mice together, you obtain a 2:1 ratio of short-tailed mice to long-tailed mice. None of the short-tailed progeny are homozygous. What type of allele results in short tails? A) dominant negative allele B) temperature-sensitive allele C) lethal allele D) partially dominant allele E) incompletely penetrant allelearrow_forwardCan you please help answer this question with elaborate step?arrow_forward
- In some breeds of dogs, a dominant allele controls the characteristics of barking while trailing. In these dogs, another independent allele produces erect ears; it is dominant over the allele for drooping ears. Suppose a dog breeder wants to produce a pure-breeding strain of droop-eared barkers, but he knows that the genes for silent trailing and erect ears are present in his kennels, how would he proceed?arrow_forwardPart A) You cross a fly with straight wings with a fly with curved wings to produce the F1 generation, all of which exhibit straight wings. In the F2 generation, you observe 65 straight-winged flies and 16 curved-wing flies. Based upon the results, which phenotype is recessive? Part B) You think this trait is controlled by a single gene, but the F2 numbers don’t quite match a 3:1 expected ratio. Perform a chi-square analysis to determine if the variation you observe is due to chance or not. Based upon this determination, would you keep or reject the “null hypothesis”? Show your work and explain your reasoning.arrow_forwardChoose one plsarrow_forward
- Clouded leopards are a medium sized, endangered species of cat, living in the very wet cloud forests of Central America. Assume that the normal spots (XN) are a dominant, sex-linked trait and that dark spots are the recessive counterpart. Suppose as a Conservation Biologist, you are involved in a clouded leopard breeding program. One year you cross a male with dark spots and a female with normal spots. She has four cubs and, conveniently, two are male and two female. One each of the male and female cubs have normal spots and one each have dark spots. What is the genotype of the mother? Diagram the cross. Suppose a few years later, you cross the female cub that has normal spots with a male that also has normal spots. How many of each genotype will be found in the cubs (assume 4)?arrow_forwardClouded leopards are medium-sized, endangered species of cat, living in the very wet cloud forests of Central America. Assume that the normal spots (XN) are a dominant, sex-linked trait and that dark spots are the recessive counterpart. Suppose as a Conservation Biologist, you are involved in a clouded leopard breeding program. One year you cross a male with dark spots and a female with normal spots. She has four cubs and, conveniently, two are male and two female. One each of the male and female cubs has normal spots and one each has dark spots. What is the genotype of the mother? Diagram the cross. Suppose a few years later, you cross the female cub that has normal spots with a male that also has normal spots. How many of each genotype will be found in the cubs (assume 4)? Show complete crossarrow_forwardChoose one plsarrow_forward
- Clouded leopards are a medium sized, endangered species of cat, living in the very wet cloud forests of Central America. Assume that the normal spots (XN) are a dominant, sex linked trait and that dark spots are the recessive counterpart. Suppose as a Conservation Biologist, you are involved in a clouded leopard breeding program. One year you cross a male with dark spots and a female with normal spots. She has four cubs and, conveniently, two are males and two females. One male and one female cub have normal spots and one each have dark spots. What is the genotype of the mother? Suppose a few years later, you cross the female cub that has normal spots with a male that also has normal spots. How many of each genotype will be found in the cubs (assume 4)? Will any of the cubs from this latest cross have dark spots?arrow_forwardThe color of spaniel dogs is controlled by a couple of alleles : B (dominant) leads to black hair [B], b to a tawny color [T]. In second independent gene, the dominant S allele gives a uniform colored fur [U] and the recessive s allele to a speckled coat [S]. A pure lineage uniformly black male is mated to a tawny speckled female. Among F2 animals, a uniformly black dog is crossed with a tawny speckled bitch. The progeny gives 1/4 [BU], 1/4 [TU], 1/4 [SB], 1/4 [ST]. How is this type of cross called and what is its goal? What are the genotypes of their parents?arrow_forwardWhen you decide to breed your Labrador retriever Molly and sell the puppies, you discover that two of Mollys four siblings have developed a hip disorder that is traceable to the action of a single recessive allele. Molly herself shows no sign of the disorder. If you breed Molly to a male Labrador that does not carry the recessive allele, can you assure a purchaser that the puppies will also be free of the condition? Explain your answer.arrow_forward
- Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning