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Chapter 14, Problem 26P

In land plants, there is an alternation of generations between a haploid gametophyte generation and a diploid sporophytic generation. Both generations are typically multicellular and may be free - living. The male (pollen) and female (embryo sac) gametophytes are the haploid generation of flowering plants.

How would you conduct a screen to identify genes required for female gametophyte development in Arabidopsis?

How would you conduct a screen to identify genes required for male gametophyte development?

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In a particular plant species, 2n=12. For this organism, how many chromosomes, and how many DNA molecules will be present per cell for each of the following?  e) root meristem cell in telophase of mitosis (cytokinesis complete)  f) microspore mother cell (in anther) in prophase 1 of meiosis  g) microspore mother cell in metaphase II of meiosis  h) pollen grain ( after meiosis is and cytokinesis complete)
The drooping, bell-like flower Aquilegia canadensis is adapted for cross-pollination. However, if the plant has not been pollinated previously, self-pollination can occur. However, if cross pollination occurs after self-pollination takes place, the pollen from cross pollination reaches the style before the pollen from self-pollination. Using course concepts and vocabulary 1) Provide a reasoning for this phenomenon. 2) Would this adaptation for reproduction be beneficial for the plant?
In the absence of centrioles among the cells of higher plants, give one pole-based mechanism exhibited by such cells and briefly explain how it helps chromosomes be pulled in opposite poles.

Chapter 14 Solutions

Genetic Analysis: An Integrated Approach Plus Mastering Genetics with Pearson eText -- Access Card Package (3rd Edition) (What's New in Genetics)

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General Embryology Review in 20 minutes; Author: Medical Animations;https://www.youtube.com/watch?v=4YKvVeVMmEE;License: Standard youtube license