EBK CAMPBELL BIOLOGY
EBK CAMPBELL BIOLOGY
11th Edition
ISBN: 8220103613828
Author: Reece
Publisher: PEARSON
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Chapter 21, Problem 4TYU

DRAW IT Below are the amino acid sequences(using the single-letter code; see Figure 5.14) of four short segments of the FOXP2 protein from six Speeles: chimpanzce (Q, orangutan (()), gorllla (G), rhesus macaque (R), mouse (M), and human (H). These segments contain all of the amino acid differences helween the FOXP2 proteinsof these species.

Chapter 21, Problem 4TYU, DRAW IT Below are the amino acid sequences(using the single-letter code; see Figure 5.14) of four

Use a highlighter to color anv amino acid that varies among the species. (Color that amino acid in all sequences.

  1. (a) The C, G, R sequences are identical. Identily which lines correspond to those sequences.
  2. (b) The O sequence differs from the C, G, R speieces at two amino acids. Underilnethetwodlffcrences inthe H sequence.
  3. (c) The O sequence diffen from the C, G, R sequences at one amino acid (having V instead of A) and from the H sequence at three amino acids. Identify tho O sequence.
  4. (d) In the M sequence,circle the amino acid(s) that differ from the C, G, R sequence, and draw a square around those that differ from the H sequence.
  5. (e) Primates and rodents diverged between 60 and IO0 million years ago. and chimpanzees and humans about 6 million years ago. Compare the amino acid differences between the mouse and the C, G, R species with those between the human and the C, G, R species. What can you conclude?
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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 21 Solutions

EBK CAMPBELL BIOLOGY

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