Errors in crossing-over can happen when... Select one: a. Non-homologous chromosomes cross-over and recombine. b. Homologous chromosomes form chiasmata at the wrong (non-homologous) locations. c. Chromosome breakage during crossing-over results in a chromosome fragment getting added to a different (incorrect) chromosome. d. All of the above

Errors in crossing-over can happen when... Select one: a. Non-homologous chromosomes cross-over and recombine. b. Homologous chromosomes form chiasmata at the wrong (non-homologous) locations. c. Chromosome breakage during crossing-over results in a chromosome fragment getting added to a different (incorrect) chromosome. d. All of the above

Name: Errors in crossing-over can happen when... Select one:a.Non-homologous
Uploaded: 2024-03-20T06:42:55.000Z
Channel: Bartleby
Description: Errors in crossing-over can happen when... Select one:a.Non-homologous chromosomes cross-over and recombine.b.Homologous chromosomes form chiasmata at the wrong (non-homologous) locations.c.Chromosome breakage during crossing-over results in a chromo

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter20: Chromosomes And Human Genetics

Section: Chapter Questions

Problem 3CT: People with Down syndrome have an extra copy of chromosome 21, for a total of 47 chromosomes....

See similar textbooks

Similar questions

Metacentric chromosomes have a centromere located: A. near the middle of the chromosome (chromosome has two arms of approx. equal length) B. towards one end (chromosome has one long arm and one short arm) C. near one end of the chromosome (chromosome has one long arm and a knob at the other end)
. For the chromosomes shown in Figure , draw the chromatids that would result from a two-strand double crossover: one crossover between C and D and the other crossover between D and E.
Chromosome translocations include: A. Alterations in which the genetic material remains the same but rearranged B. Alterations in which the total amount of genetics information increases C. Alterations in which the total amount of genetics information decreases D. Variations in the chromosome number
Crossing over usually contributes to genetic variation by exchanging chromosomal segments between: A. nonhomologous loci of the genome (E) autosomes and sex chromosomes. B. chromatids of nonhomologous chromosomes C. non-sister chromatids of homologous chromosomes D. sister chromatids of a chromosome E. polyploid chromosomes
2) A. Explain how polyribosomes form. B. Why might you expect the insertion of 3 DNA base pairs to be less disruptive than th deletion of a single base pair? C. Compare and contrast mitosis and meiosis with respect to their genetic outcomes? D. What are the possible consequences of non-disjunction during cell division? E. How does meiosis increase genetic diversity in populations?
Altered chromosome structure can drastically affect an individual organism’s phenotype. However, some types of chromosomal rearrangements are more likely to be harmful than others. Categorize the following types of rearrangements from MOST LIKELY to be harmful to LEAST LIKELY to be harmful. A. reciprocal translocation, deletion, translocation B. deletion, translocation, inversion C. inversion, translocation, reciprocal translocation D. translocation, inversion, duplication
Which types of chromosome mutations a. increase the amount of genetic material in a particular chromosome? b. increase the amount of genetic material in all chromosomes? c. decrease the amount of genetic material in a particular chromosome? d. change the position of DNA sequences in a single chromosome without changing the amount of genetic material? e. move DNA from one chromosome to a nonhomologous chromosome?
When recombination (“crossing over”) doesn’t happen correctly, what type(s) of mutations that can occur? circle all that apply Select one or more: a. Inversion (reversal or “flipping” of part of a chromosome) b. Duplication of part of a chromosome c. Translocation (transfer of part of a chromosome to a non-homologous chromosome) d. Deletion of part of a chromosome
Why are individuals with an extra chromosome 21, that causes Down syndrome, more numerous than individuals with an extrachromosome 3 or chromosome 16? A.] There are probably more genes on chromosome 21 than on the others B.] Chromosome 21 is a sex chromosome and chromosomes 3 and 16 are not C.] Down syndrome is not more common, just more serious D.] Extra copies of the other chromosomes are probably fatal
. With regards to the grasshopper testes experiment, diakinesis is an ideal stage to determine chromosome number due to the degree of condensation of the chromosomes? Count the chromosomes at this stage. Does it represent a diploid or a haploid number?
a. What is the diploid number of chromosomes for a human? b. What is the haploid number of chromosomes for a human? Which cells are considered diploid, gametes or somatic cells? C. d. Which cells are considered haploid, gametes or somatic cells?
When recombination (“crossing over”) doesn’t happen correctly, what type(s) of mutations that can occur? Mark all that apply Select one or more: a. Deletion of part of a chromosome b. Translocation (transfer of part of a chromosome to a non-homologous chromosome) c. Duplication of part of a chromosome d.Inversion (reversal or “flipping” of part of a chromosome)