5. In cattle, the RR genotype calls for a red cow: the WW for a white cowç and the RW calls for roan color. A red bull and a white cow are mated. What types of offspring would be expected? Give the genotypes and phenotypes and the probability of each. Genotypes Phenotypes 6. A cattle breeder knows that the homless condition (H) is dominant over horned (h). He mates a heterozygous hormless cow who is roan colored with a homed roan bull. What types of offspring would be expected from this cross? Give the probability of each.

5. In cattle, the RR genotype calls for a red cow: the WW for a white cowç and the RW calls for roan color. A red bull and a white cow are mated. What types of offspring would be expected? Give the genotypes and phenotypes and the probability of each. Genotypes Phenotypes 6. A cattle breeder knows that the homless condition (H) is dominant over horned (h). He mates a heterozygous hormless cow who is roan colored with a homed roan bull. What types of offspring would be expected from this cross? Give the probability of each.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter19: The Evolution Of Populations

Section: Chapter Questions

Problem 15RQ: The good genes hypothesis is a theory that explains what? why more fit individuals are more likely...

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Discuss Concepts Many human diseases are caused by recessive alleles that are not expressed in heterozygotes. Some people think that eugenicsthe selective breeding of humans to eliminate undesirable genetic traitsprovides a way for us to rid our populations of such harmful alleles. Explain why eugenics cannot eliminate such genetic traits from human populations.
1. In humans, widow’s peak (W) is dominant over having a straight hairline (w). If a homozygous man with a widow’s peak has a child with a woman with a straight hairline, what are the odds the child will have a widow’s peak? Show work. 2. Ellis-van Creveld syndrome is a recessive inherited condition that results in 6-fingered dwarfism. Two parents without this condition have with Ellis-van Creveld syndrome. What are the genotypes of the parents and offspring? What are the odds that the son will have a 6-fingered child if his partner is a woman who is heterozygous for the condition? Show work. 3. The gene for dangling earlobes is dominant over the gene for attached earlobes. A woman with attached earlobes has a child with a man with dangling earlobes whose mother had attached earlobes. What is the probability that this child will have attached lobes? Show work. 4. In humans, normal pigmentation is due to a dominant gene, while albinism is recessive. A normally pigmented man has a…
1. In a particular bird species, the tips of the feathers are tinged with blue, white, or silver. The BB genotype calls for blue-tipped feathers. The WW genotype calls for white-tipped feathers. The BW genotype calls for an intermediate with silver-tipped feathers. A mating occurs between a blue-tipped bird and a white-tipped bird. What types of offspring would be expected? Give the genotypes and phenotypes of the possible offspring and the probability of each. 2. The bird species described in question 5 has an ornamental plumage on its head. The plumage feathers are either flexible or stiff. The allele for flexible plumage is dominant over the allele for stiff plumage. A male who is heterozygous for plumage and has silver-tipped wings mates with a female who has stiff plumage with silver-tipped wings. What types of offspring would be expected from this cross? Give the probability of each. 3. In some cats, the gene for tail length shows incomplete dominance. When a cat with a…
5. The horned / hornless traits in sheep are examples of sex-influenced traits. Horned (H) acts as a dominant in rams, while hornless (H’) acts as a dominant in ewes. Thus, the heterozygote exhibits a different phenotype depending upon the sex of the individual. Give the phenotypic results expected in the mating of heterozygous hornless ewes with heterozygous horned rams. Don't use open ai
10.You are breeding different varieties of roses in your garden. When you cross a true-breeding yellow "Texas Beauty" rose with a true-breeding "Ruby" red rose, you get all red roses. But when you cross a "Texas Beauty" yellow with the yellow variety "Jealousy," you get a 9:7 ratio of red to yellow flowers! What can you conclude from these results? The red allele is dominant to the yellow allele. There is a mutation in the gene for yellow pigment in the "Jealousy" variety. C. There are epistatic interactions between at least two genes for rose pigment. D. There is no recessive allele for the red pigment gene.
C. Give the genotypic and phenotypic ratios 1. Hemophilia is a disease caused by a gene found on the X chromosome. The recessive allele causes the disease. Tall (T) is dominant over short (t). A homozygous tall female carrier marries a short hemophiliac male. Predict the genotype and phenotype of their offspring. 2. In mice, the ability to run normally is a dominant trait. Mice with this trait are called running mice (R). The recessive trait causes mice to run in circles only. Mice with this trait are called waltzing mice (r). Hair color is also inherited in mice. Black hair (B) is dominant over brown hair (b). 2 heterozygous running, heterozygous black mice were crossed. Give the genotypic and phenotypic ratios of their offspring.
11. Blood type is controlled by a gene with multiple alleles. A produces type A blood. B codes for type B blood. A and B are codominant so a heterozygote has type AB blood. The O allele is recessive to both A and B and produces type O blood. A. What are the possible genotypes of a man with type A blood? B. What are the possible genotypes of a man with type B blood? C. Can a man with type B blood be the father of a baby with type O blood? Why or why not? Explain your answer. D. A man with type A blood marries a woman with type B blood. What blood types are possible for their children? Explain your answer. E. A man with type O blood is in a car accident and has to receive a transfusion at the hospital. What types of blood can he receive? F. In the Charlie Chaplin paternity case of the 1940s, a young woman sued Chaplin for child support, claiming he was the father of her child. Chaplin’s blood was type O, the mother was type A and the baby was type B. Could…
1. The frequency of a recessive disease is 9%. What is the frequency of the allele that causes s the disease? a) What is the frequency of the dominant allele? b) What is the frequency of the carriers (heterozygotes) of the disease?
6. Consider that people with blue eyes must have two alleles for blue eyes since blue eye color is a recessive trait. A blue-eyed person and a brown-eyed person have an offspring with blue eyes. The brown-eyed person must A. have two alleles for blue eyes. B. have two alleles for brown eyes. C. not have the dominant brown eye allele. D, have one allele for blue eyes and one allele for brown eyes.
2. In a summer squash, white fruit color (W) is dominant over yellow fruit (w) and disk-shaped fruit (D) is dominant over sphere-shaped fruit (d). If a squash plant true-breeding for white, disk-shaped fruit is crossed with a plant true-breeding for yellow, sphere-shaped fruit, what are the possible genotypes and phenotypes of their offspring. 3. In mice, the ability to run normally is a dominant trait. Mice with this trait are called running mice (R). The recessive trait causes mice to run in circles only. Mice with this trait are called waltzing mice (r). Hair color is also inherited in mice. Black hair (B) is dominant over brown hair (b).For each of the following problems, determine the parent genotypes, determine possible gametes then construct a Punnett Square to solve.a. Cross a heterozygous running, heterozygous black mouse with a homozygous running, homozygous black mouseb. Cross a homozygous running, homozygous black mouse with a heterozygous running brown mouse.
The good genes hypothesis is a theory that explains what? why more fit individuals are more likely to have more offspring why alleles that confer beneficial traits or behaviors are selected for by natural selection why some deleterious mutations are maintained in the population why individuals of one sex develop impressive ornamental traits
11. Blood type is controlled by a gene with multiple alleles. A produces type A blood. B codes for type B blood. A and B are codominant so a heterozygote has type AB blood. The O allele is recessive to both A and B and produces type O blood. A. What are the possible genotypes of a man with type A blood? AA or AO B. What are the possible genotypes of a man with type B blood? BB or BO C. Can a man with type B blood be the father of a baby with type O blood? Why or why not? Explain your answer. If the man has blood group B than it's genotype can be BB or BO. If the man has BO blood group and the woman he marries is either AO,BO or OO blood genotype than only the man can have a child with O blood group type. Because the child will receive O allele from both the parents as O blood group type is only dominant when it's in pair because it's a recessive allele. D. A man with type A blood marries a woman with type B blood. What blood types are possible for their…