You are interested in studying the evolution of Rnase-based gametophytic self-incompatibility. You go into a population and identify 4 S-alleles present. These alleles are designated S₁, S2, S3, and S4, and they occur in the sporophyte only as heterozygotes at equal frequency, in each of the 6 possible combinations: S1 S2 S1 S3 S1 S4 S2 S3 S2 S4 S3 S4 Assuming random dispersal of pollen, what fraction of S₁ pollen grains that land on stigmas will be able to fertilize ovules in this population? Why?

You are interested in studying the evolution of Rnase-based gametophytic self-incompatibility. You go into a population and identify 4 S-alleles present. These alleles are designated S₁, S2, S3, and S4, and they occur in the sporophyte only as heterozygotes at equal frequency, in each of the 6 possible combinations: S1 S2 S1 S3 S1 S4 S2 S3 S2 S4 S3 S4 Assuming random dispersal of pollen, what fraction of S₁ pollen grains that land on stigmas will be able to fertilize ovules in this population? Why?

Name: You are interested in studying the evolution of Rnase-based gametophy
Uploaded: 2024-03-20T06:43:04.000Z
Channel: Bartleby
Description: You are interested in studying the evolution of Rnase-based gametophytic self-incompatibility. Yougo into a population and identify 4 S-alleles present. These alleles are designated S1, S2, S3, and S4,and they occur in the sporophyte only as heteroz

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter2: Cells And Cell Division

Section: Chapter Questions

Problem 20QP: In the following diagram, designate each daughter cell as diploid (2n) or haploid (n).

See similar textbooks

Similar questions

Diploid nuclei of the ascomycota fungus Neurospora crassa contain 14 chromosomes. A single diploid cell in an ascus will eventually turn into a total of eight ascospores. What is the chromosome count in a single mature Neurospora ascospore? -28 -none of the options are correct -21 -7 -14
The table shows three related species of potato, and the number of chromosomes each species carries in its somatic cells. S. avilesii is diploid. S. tuberosum is the widely cultivated species. Potatoes propagate by asexual reproduction and do not depend only on gametes for reproduction. Species Number of chromosomes in somatic cells S. tuberosum is likely to be a larger, more vigorous plant than S. avilesii. Classify each statement about these potato species as true or false. Gametes produced by S. microdontum contain 18 chromosomes. S. microdontum is aneuploid. S. microdontum is a triploid with 3x chromosomes. Solanum avilesii True 24 The basic chromosome number (x) for these species is 6. S. tuberosum is a tetraploid with 4x chromosomes. Solanum microdontum 36 The basic chromosome number (x) for these species is 12. S. microdontum could have arisen only from a cross between S. avilesii and S. tuberosum. False Solanum tuberosum 48 S. microdontum could have arisen from a cross between…
A heterozygous diploid yeast Aa Bb went through meiosis. What percentage of the haploid spores will have recombinant combinations of alleles? What if genes A and B are unlinked? Explain What is genes A and B are linked? Explain
Each sperm of a tomato plant contains seven chromosomes. What are the haploid and diploid number for tomatoes? haploid=7 and diploid=14 haploid=14 and diploid=7 haploid=7 and diploid=49 haploid=3 and diploid=7
In the plant, Haplopappus gracile there is one long pair and one short pair of chromosomes. In the diagrams below, anaphase of individual cells in meiosis or mitosis in a plant that is heterozygous for the genes, A and B (which are on separate chromosomes) are shown. The lines represent chromosomes or chromatids and the points of the "V" are the centromeres. For each case, indicate if the cell represents meiosis I, meiosis II, mitosis, or impossible situation. Provide a brief (one sentence) reason for your decision. 1. A A a В a B 9. A a B A a 2. а В В a A a B 9. B. a A 3.
Indicate the percentage of tetrads that would have 0,1, 2, 3, or 4 viable spores after Saccharomycescerevisiae a / α diploids of the following genotypesare sporulated:a. A true-breeding wild-type strain (with no mutations in any gene essential for viability).b. A strain heterozygous for a null (completely inactivating) mutation in a single essential gene.For the remaining parts of this problem, considercrosses between yeast strains of the form a × b, wherea and b are both temperature-sensitive mutations indifferent essential genes. The cross is conducted under permissive (low-temperature) conditions. Indicatethe percentage of tetrads that would have 0, 1, 2, 3, or4 viable spores subsequently measured under restrictive (high-temperature) conditions.c. a and b are unlinked, and both are 0 m.u. from thecentromere.d. a and b are unlinked; a is 0 m.u. from the centromere, while b is 10 m.u. from the centromere.e. a and b are 0 m.u. apart.f. a and b are 10 m.u. apart. Assume all…
Figure 9.3 Schematic representation of sexual reproduction (hyphal fusion) in Sordaria fimicola. ㅏ (a) Tan X Tan (b) -Haploid- Black X Black (c) Tan X Black (with no crassing-over) Fusion -Diploid- Majosis I 想想 * X* X * Y * X * Meiasis I X X X X X X -Haploid- Mitosis Position in ascus Bad D II CHIXO Nonrecombinant type
Termites have a haplo-diploid sex determination system where females develop from a fertilized egg (they are diploid, having one allele from the female cueen and one allele from the male), and males develop from unfertilized eggs (they are haploid, having only one allele from the queen). Assuming that the female parent (queen) is heterozygous for a particular gene, what is the probability that a female offspring will inherit the recessive allele from her mother? What is the probability that a male offspring will inherit a recessive allele from his mother? O A. The probability that a daughter will inherit a recessive allele from her mother is 50%; the probability that a son will inherit a recessive allele from his mather is 50%. OB. Ihe probobility that a daughter will inherit a recessive allele from her mother is 0%; the probability that a son will inherit a recessive allele from his mother is 100%. O C. The probability that a daughter will inherit a recessive allele from her mother is…
Consider a species of wasp in which females are diploid and come from fertilized eggs, while males are haploid and come from unfertilized eggs. Assuming that a queen mates with only one male, determine the coefficient of relationship (r) for each of the following. a)A female (worker) to her sister: b)A female (worker) to her brother: c)A female (worker) to her father
In moss, the genes A and B are expressed only in the gametophyte. A sporophyte of genotype A/a ; B/b is allowed to produce gametophytes.a. What proportion of the gametophytes will be A ; B?b. If fertilization is random, what proportion of sporophytes in the next generation will be A/a ; B/b?
There are two genetic loci determiningthe mating type, locus A with 288 alleles and locus B with 81 alleles.(2 points) List a cross of two Schizophyllum commune strains that could successfully mate and across that could not succeed.Successful cross:Unsuccessful cross
In the following diagram, designate each daughter cell as diploid (2n) or haploid (n).