25. Crossing over involves each of the following with the EXCEPTION of O A. Transfer of DNA segments between homologous chromosomes O B. Formation of synaptonemal complex O C. Alignment of homologous chromosomes D. None, all are involved in crossing over O E. Formation of chiasmata

25. Crossing over involves each of the following with the EXCEPTION of O A. Transfer of DNA segments between homologous chromosomes O B. Formation of synaptonemal complex O C. Alignment of homologous chromosomes D. None, all are involved in crossing over O E. Formation of chiasmata

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter11: Meiosis: The Cellular Basis Of Sexual Reproduction

Section: Chapter Questions

Problem 3TYK: Chiasmata: a. form during metaphase II of meiosis. b. occur between two nonhomologous chromosomes....

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Similar questions

An abnormality in which there is one more or one fewer than the normal number of chromosomes is called (a) a karyotype (b) a fragile site (c) an aneuploidy (d) trisomy (e) a translocation
Which of the following is not true in regard to crossover? Spindle microtubules guide the transfer of DNA across the synaptonemal complex Nonsister chromatids exchange genetic material Chiasmata are formed Recombination nodules mark the crossover point.
Abnormalities in the number of X chromosomes tend to be milder than the same abnormalities in autosomes because of _______. a. deletions b. nonbomologous recombinat ion c. synapsis d. X inactivation
The DNA content in a diploid cell in G2 is X. If that cell goes into meiosis at metaphase II, the DNA content will be: a. 0.1 X. b. 0.5 X. c. X. d. 2X. e. 4X.
Metaphase in mitosis is similar to what stage in meiosis? a. prophase I b. prophase II c. metaphase I d. metaphase II e. crossing-over
In the human sperm: a. there must be one chromosome of each type, except for the sexchromosomes, where either an X or a Y chromosome is present. b. a chromosome must be represented from each parent. c. there must be an unequal number of chromosomes from both parents. d. there must be representation of chromosomes from only one parent. e. there is the possibility of 246 different combinations ofmaternal and paternal chromosomes.
Explain how the random alignment of homologous chromosomes during metaphase I contributes to the variation in gametes produced by meiosis.
Which of the following is not associated with sperm production? a. daughter cells identical to the parent cell b. variety in resulting cells c. chromosome number halved in resulting cells d. four daughter cells arising from one parent cell e. 23 chromosomes in the human sperm
If a muscle cell of atypical organism has 32 chromosomes, how many chromosomes will be in a gamete of that same organism? 8 16 32 64
In a cell at __________, each chromosome consists of a pair of attached chromatids, (a) mitotic prophase (b) meiotic prophase II (c) meiotic prophase I (d) meiotic anaphase I (e) all the preceding
Which of the following statements about cell cycle regulators is incorrect? a. The concentrations of cyclins change throughout the cell cycle. b. Cyclins are present in all stages of the cell cycle except S. c. Cyclin-Cdk complexes phosphorylate target proteins. d. Cdks combine with cyclin to move the cycle into mitosis. e. During anaphase of mitosis, cyclin is degraded, allowing mitosis to end.
Discuss Concepts One of the human chromosome pairs carries a gene that influences eye color. In an individual human, one chromosome of this pair has an allele of this gene that contributes to the formation of blue eyes. The other chromosome of the pair has an allele that contributes to brown eye color (other genes also influence eye color in humans). After meiosis in the cells of this individual, what fraction of the nuclei will carry the allele that contributes to blue eyes? To brown eyes?