In a population of beetles carapace color is determined by a single gene with two alleles: Beetles homozygous for one allele have brown bodies; homozygotes of the other allele have green bodies; heterozygotes have green bodies with brown spots. In a sample of 1000 beetles there were 240 brown, 40 green, and 720 green with brown spots. Is this population in genetic equilibrium with respect to the gene for body color? O Yes, because the expected genotype frequencies sum to 1. O Yes, because the allele frequencies sum to 1. O No, there are more homozygotes than expected. O There is not enough information to determine. O No, there are more heterozygotes than expected. O Yes, observed and expected phenotypes are the same.

In a population of beetles carapace color is determined by a single gene with two alleles: Beetles homozygous for one allele have brown bodies; homozygotes of the other allele have green bodies; heterozygotes have green bodies with brown spots. In a sample of 1000 beetles there were 240 brown, 40 green, and 720 green with brown spots. Is this population in genetic equilibrium with respect to the gene for body color? O Yes, because the expected genotype frequencies sum to 1. O Yes, because the allele frequencies sum to 1. O No, there are more homozygotes than expected. O There is not enough information to determine. O No, there are more heterozygotes than expected. O Yes, observed and expected phenotypes are the same.

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

See similar textbooks

Similar questions

Selection confers a reproductive advantage to individuals based on their adaptations, and therefore causes the alleles carried by those individuals to increase in the population. Selection can be simulated by having your partner remove any three individuals of a particular suit as you deal the cards into a pile. The fitness of that variant is therefore 0.77 (10/13 survive), while the fitness of the other three variants remains at 1.0 (13/13 survive). Recalculate allelic (suit) frequencies after selection. 1. What is the effect of selection on reproduction, allelic diversity, and frequency? 2. What would happen if similar selection continued over several generations? Cite references.
A colony of woolly-winged bats inhabited an isolated cave in Canada. Some of the bats had light- brown wings, a recessive trait, and the others had dark-black wings, a dominant trait. A freak cave flood randomly killed 98% of the bats. By chance all the survivors had light-brown wings. Which of the following statements best describes the situation? The allele frequency for wing color was altered by genetic drift. O Individual with light-brown wings were favored by natural selection, which altered the allele frequency in the population; an example of directional selection. O Even if no new bats arrive in the area, genetic mixing in the surviving population will insure future generations will contain both wing color variations. O This is an example of sympatric speciation. Since the dark-black wing color is a dominant trait, it is likely to reappear in the population within a few generations, thus restoring Hardy-Weinberg equilibrium.
In a Gecko population a group of Geckos skin color is controlled by one gene with two alleles "R"which codes for red and is dominant to "r" which codes for yellow and is recessive. If 100 Geckos are on the island and you gene test them to know their alleles you'll observe that 30 are homozygous red, 60 are heterozygous red, and 20 are homozygous recessive. Determine the Chi-square. assuming the original parents (Rr xRr).* Hint: determine the expected first before plugging into the equation awesome as this one? REGISTER NOW 13 5 11 4 D
In a population of 100 individuals, there are exactly 16 individuals expressing the recessive phenotype for a trait controlled by a single diallelic locus (i.e. a diploid organism). If the population is at genetic equilibrium, how many heterozygous individuals would you expect to find? 48 36 84 cannot be determined 16
Genes and inheritance have an impact on the lives of parents and their progeny, the F1 and F2 generations. Population genetics also deals with genetics, but in a different way. What is the definition of population genetics? How can the abundance of an allele be different in a population as compared with an individual of the population? (Hint: How can the phenotype of a population differ from that of an individual? Can a population have red flowers, pink flowers, and white flowers? Can one individual have all three types of flowers?)
A very large population of rabbits has been allowed to breed randomly in a laboratory research program. The rabbits vary in their coat colour, which is either gray or black. After many generations, 25% of the rabbits display a recessive phenotype for gray coat colour (aa), the same percentage as at the beginning of the breeding program. The other 75% of the rabbits show the dominant black coat phenotype, with heterozygotes (Aa) indistinguishable from the homozygous dominants (AA) What is a reasonable conclusion explaining the fact that the frequency of the recessive trait (aa) has not changed over time? a. There has been sexual selection favouring allele a b. The two phenotypes have about equal fitness under laboratory conditions C. The population is undergoing genetic drift d. The genotype AA is lethal
Parent Generation BB BB Bb Bb Bb Bb Bb Bb bb bb Rabbits with the brown coat color allele (B) are dominant over rabbits with the white coat color allele (b). A small population of rabbits (Parent Generation) has 2 individuals homozygous for B, 6 individuals that are heterozygous, and 2 individuals homozygous for b. What would you predict the frequencies of alleles B and b to be in the next (first) generation if this population is not evolving Edit View Insert Format Tools Table
The color of the coat of a hypothetical breed of cattle is controlled codominantly by a gene in locus R. A routine inspection of a randomly mating population with 353 animals showed that 13% of them are red , 45% are roan and 42% are white. question: how many animals have the recessive allele?
In Drosophila melanogaster, wing shape is an autosomal trait. Vestigal wing is recessive (v) to the dominant trait for the normal long wings (V). In a mainland source population, the allele frequency of v is 0.02 . A small, experimental population of 100 flies was introduced on an island and had 20 flies with vestigal wings and 40 heterozygotes. What are the allele frequencies of V and v in this introduced population? What proportion (%) of heterozygotes and homozygous recessive flies would you expect to see after a few generations of mating on this island? What phenomenon of population genetics does this experiment demonstrate? p+q=1, p^2+ 2pq + q^2 = 1
Budgies (Melanopsittacus undulatus) are attractive birds that come in many colors. Budgies may produce either or both of two types of pigment in their feathers: a blue pigment and a yellow pigment. Whether or not each pigment is produced is governed by one gene with two alleles. Blue pigment (B) is dominant to no blue pigment (b), and yellow pigment (Y) is dominant to no yellow pigment (y). A budgie that produces neither blue nor yellow pigment in its feathers looks white. A budgie that produces both blue and yellow pigment in its feathers looks green. A. What is/are the possible genotype(s) of a yellow budgie? B. What is the phenotype of a budgie with the genotype BbYy? C. Suppose you cross a homozygous blue budgie with a homozygous white budgie. Predict the results of this cross, both genotype and phenotype. D. Now suppose you cross one of the offspring from the mating in part C with a budgie whose genotype is BbYy. Predict the results of your cross. What are the expected genotypes…