tosomal recessive C. )linked dominant D. X-linked recessive ?????4600 o. You hav
ID: 268025 • Letter: T
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tosomal recessive C. )linked dominant D. X-linked recessive ?????4600 o. You have identified a previously unknown human gene that appears to have a role in autism. It is similar enough in A sequence to a known mouse gene that you believe the two genes may be evolutionarily related. You determine and compare the DNA sequences, the predicted mRNA sequences, and the predicted amino acid sequences corresponding to the two genes. You A. DNA sequences. B. mRNA sequences. C. would expect tofindthegreatest sequence similarityfrom comparisons of the two: + amino acid sequences. las-Detseof D. All three comparisons are likely to show the same degree of sequence similarity 16. Below is a pedigree of a family in which all the people in generation II are dead (indicated with a slash) because of political unrest in their country. Circles represent females, squares represent males Which children in generation Ill could be traced to the grandmother in this pedigree by using only mitochondrial DNA sequences A. A and D B. A, B, and C C. B,C,and E D. A, B, C, D, and E that you call the prince crab, which has only 100 pairs of chromosomes in its cells. From this finding, you can conclude that A. the king crab has a larger genome than the prince crab. B. the king crab has more genes than the prince crab C. the king crab evolved from the prince crab. D. all of the above. E. there is not enough information to make any of the above conclusions 18. A woman who is a carrier for X-linked hemophilia (she does not have the disease) marries a man who does not have hemophilia. They have a daughter, named Angela, who does not have the disease. Angela marries George, who also does not have hemophilia. Angela and George have a son named Robbie. What is the chance that Robbie will have hemophilia? c 1/4 0 1/3 1/2Explanation / Answer
1) option C . amino acid sequence. the DNA or codon might be different but due to the degeneracy of codon, they may code for the same amino acid. so there is a change in DNA but not in a protein sequence.
2) mitochondria always comes from mother not from father. A, B and C produced from mother so they have the gene from the grandmother. option B. A, B and C.
3) option D. all of the above.
larger genome means more gene.
4) mother is a carrier and father is normal.
XhX x XY = XhX, XhY, XY, XX
for girl child 50% and boy child 50% probability of hemophilia.
from boy again 50% chances for normal and 50% chances for hemophilia.
so overall probability = 1/2 *1/2 = 1/4 or 25%. option C.
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