Stern's Introductory Plant Biology
14th Edition
ISBN: 9781259682742
Author: James Bidlack, Shelley Jansky, Kingsley R Stern
Publisher: McGraw-Hill Education
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Chapter 12, Problem 5RQ
At what stage of a life cycle does the chromosome number of cells switch from x to 2x?
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If there are 9 chromosome pairs, what is the chromosome number at telophase I (after cytokinesis)?
How many chromatids are present in a duplicated chromosome?
A diploid cell has 15 picograms of DNA in G₁ phase. If this cell is a germ line cell that undergoes meiosis, how much DNA will each daughter cell contain at the end of
meiosis I? How much DNA will each daughter cell contain at the end of meiosis II?
MI = 30 pg: MII = 15 pg
O MI = 15 pg; MII = 15 pg
MI = 7.5 pg; MII = 15 pg
O MI = 15 pg: MII = 7.5 pg
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- What structures are found in a chromosome? Group of answer choices Two structures for the mitotic spindle to bind, and two complex repetitive structures that are maintained by telomerase One structure for the mitotic spindle to bind, and two complex repetitive structures that are maintained by telomerase One structure for the mitotic spindle to bind, and one complex repetitive structure that is maintained by telomerase Two structures for the mitotic spindle to bind, and one complex repetitive structure that is maintained by telomerase.arrow_forwardIf there are 4 chromosomes in the parent cell, how many chromosomes will there be in the daughter cells after mitosis? After meiosis?arrow_forwardIn humans, each cell normally contains a diploid (2n) chromosome number of 46. Say that a human body cell and sex cell will undergo mitosis and meiosis respectively, provide the number of chromosomes in each cell for every stage. Stage of Mitosis Number of Stages of Meiosis Number of Chromosomes in Chromosomes in One Cell One Cell Prophase 2n = Prophase 1 2n = Prometaphase 2n = Prometaphase 1 2n = Metaphase 2n = Metaphase 1 2n = Anaphase 2n = Anaphase 1 2n = Telophase and Cytokinesis Telophase 1 and Cytokinesis 2n = n = Prophase 2 Prometaphase 2 n = Metaphase 2 n = Anaphase 2 = u Telophase 2 and Cytokinesis n =arrow_forward
- Suppose there are two genes on two different chromosomes, one gene called G and the other called D. An individual has the genotype GgDd. Which of the following drawings correctly shows cells in this individual after DNA replication but before cell division of the first meiosis? Assume no recombination/crossing-over occurs between the chromosomes. a) G|GgTg 11 11 D--Da-d 1 N Gg Gg D-d Dd b) d) G+gGg 7/2007 D-d D-d GG gtg DD ddarrow_forwardIf an organism has 15 pairs of homologous chromosomes, how many chromosomes will each daughter cell have after telophase of mitosis? In this same organism, how many chromosomes will each daughter cell have after telophase II of meiosis?arrow_forwardwhat Attaches Part of OneChromosome to Another Chromosome?arrow_forward
- Are sister chromatids attached at the centromere considered to be one or two chromosomes?arrow_forwardIf the most basic function of the cell cycle is to accurately duplicate the DNA in the chromosomes and distribute the copies precisely to the daughter cells, why are there gaps between S-phase and M-phase?arrow_forwardWhat is a chromosomal Island?arrow_forward
- In some insects the female have two x chromosomes, while the males have One x chromosomes and no y chromosome .if the normal deploid number in an insect of this type is 14 what would be the number of chromosomes in the body cells of males and of females?arrow_forwardHow many genes are there on chromosome 4?arrow_forwardWhich process is responsible for creating unique recombinant chromosomes during meiosis?arrow_forward
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