Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 24, Problem 21RQ
The advantage of yeast cells over bacterial cells to express human proteins is that:
- yeast cells grow faster
- yeast cells are easier to manipulate genetically
- yeast cells are eukaryotic and modify proteins similarly to human cells
- yeast cells are easily lysed to purify the proteins
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Question #3:
In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would
transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming
there was just one gene conferring gametophytic obligate apomixis, and that the two parents are
inbreds, what would be the consequences of such a cross if:
a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the parental cross.
b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the…
Question #5:
Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The
genes show independent assortment. Recessive alleles at both loci are required for the facultative
apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C.
At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype.
A facultative apomict male, capable of producing viable pollen, was crossed with a sexually
reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic
ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following
temperatures*:
a) 15°C?
b) 25°C?
*for full credit, show crosses and genotypes where appropriate. Remember to position the
female first (left side) in the cross.
Type your answer here:
Chapter 24 Solutions
Biology 2e
Ch. 24 - Figure 24.14 Which of the following statements is...Ch. 24 - Figure 24.17 Which of the following statements is...Ch. 24 - Figure 24.21 If symbiotic fungi are absent from...Ch. 24 - Which polysaccharide is usually found in the cell...Ch. 24 - Which of these organelles is not found in a fungal...Ch. 24 - The wall dividing individual cells in a fungal...Ch. 24 - During sexual reproduction, a homothallic mycelium...Ch. 24 - The life cycles of perfect fungi are most similar...Ch. 24 - The most primitive phylum of fungi is the...Ch. 24 - Members of which phylum produce a club shaped...
Ch. 24 - Members of which phylum establish a successful...Ch. 24 - The fungi that do not reproduce sexually used to...Ch. 24 - A scientist discovers a new species of fungus that...Ch. 24 - What term describes the close association of a...Ch. 24 - Why are fungi important decomposers? They produce...Ch. 24 - Consider an ecosystem where all the fungi not...Ch. 24 - A fungus that climbs up a tree reaching higher...Ch. 24 - A fungal infection that affects nails and skin is...Ch. 24 - The targets for anti-fungal drugs are much more...Ch. 24 - Yeast is a facultative anaerobe. This means that...Ch. 24 - The advantage of yeast cells over bacterial cells...Ch. 24 - Why are fungal insecticides an attractive...Ch. 24 - What are the evolutionary advantages for an...Ch. 24 - Compare plants, animals, and fungi, considering...Ch. 24 - Why is the large surface area of the mycelium...Ch. 24 - What is the advantage for a basidiomycete to...Ch. 24 - For each of the four groups of perfect fungi...Ch. 24 - Why does protection from light actually benefit...Ch. 24 - Ambrosia bark beetles carry Amb/os/e//a fungal...Ch. 24 - Ecologists often attempt to introduce new plants...Ch. 24 - Why can superficial mycoses in humans lead to...Ch. 24 - Explain how the Red Queen Hypothesis describes the...Ch. 24 - Historically, artisanal breads were produced by...Ch. 24 - How would treating an area of a forest with a...
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