Why is crossing-over important? a It creates new genes. b It completes prophase of meiosis I. It creates more genetically unique gametes. d All of the above
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- What cellular process is responsible for genetic recombination? a. The independent alignment of homologous pairs during meiosis I b. Separation of the homologues in meiosis I c. Separation of the chromatids during meiosis II d. Crossing over between homologuesWhat is it called when chromosomes fail to separate properly during meiosis? A. Nondisjunction B. Karyotype C. Chromosomal separation failure D. Inappropriate separation E. KaryokinesisCrossing over.... a. leads to the exchange of material between homologous chromosomes in meiosis. b. requires the pairing of homologous chromosomes in prophase of meiosis I. c. happens less frequently between genes that are far apart on a chromosome than between genes that are close together. d. a and b, but not c e. a, b, and c
- which of these could lead to the mistake evident in the karyotype? A) a failure of cytokinesis after meiosis I in gamete formation B) a nondisjunction in meiosis II in gamete formation C) crossing over in meiosis ! in gamete formation D) fertilizaton by two sperm in zygote formationWhat went wrong during meiosis of the parent cell on the left? a) nondisjunction during meiosis I b) nothing went wrong c) nondisjunction during meiosis II d) monosomy during meiosis II e) trisomy during meiosis IConsider a diploid cell from an unknown organism that undergoes meiosis. The four gametes produced have 8, 8, 7, and 5 chromosomes. When did nondisjunction occur? a. Only meiosis I b. Mitosis c. Meiosis I and II d. Nondisjunction did not occur e. Only meiosis II Clear my choice
- Consider a diploid cell from an unknown organism that undergoes meiosis. The four gametes produced have 8, 8, 7, and 5 chromosomes. When did nondisjunction occur? a.Meiosis I and II b.Only meiosis I c.Mitosis d.Only meiosis II e.Nondisjunction did not occurWhat process might produce a gamete with one extra chromosome? a. Nondisjunction c. Translocation b. Crossing over d. Independent assortmentNondisjunction in meiosis can result in_____ . a. base-pair substitutions c. crossing over b. aneuploidy d. pleiotropy
- In which phase of meiosis does crossing over occur? Group of answer choices A. prophase I B. prophase II C. anaphase II D. metaphase I E. metaphase IWhat is a balanced gamete? A).A gamete that does not contain any chromosomes with inversions B.)A gamete with normal dosages of all genes C.)A gamete with two sets of homologous chromosomes D.)A gamete with two sex chromosomesThe four daughter cells pictured below resulted from: A) normal mitosis B) fertilization with a normal sperm C) normal meiosis D) meiosis with nondisjunction during meiosis I E) meiosis with nondisjunction during meiosis II