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1) Women born with an extra X chromosome (XXX) are healthy and phenotypically indistinguishable from normal XX women. What is a likely explanation for this finding? How could you test this explanation?
And can you please help me with this? I really need help.
2) Assume that A and B are linked and are 50 map units apart. An animal heterozygous at both loci is crossed with one that is homozygous recessive at both loci. What percentage of the offspring will show phenotypes resulting from crossovers? If you did not know that genes A and B were linked, how would you interpret the results of this cross.
Over the long period of time that life has existed on Earth, there have been a number of important or significant innovations including (but not limited to) endosymbiosis to create mitochondria and chloroplasts.
Assume you are working in a winery. You just determined that a wine sample contained 3.0 × 108 yeast/ml by analyzing its turbidity.
A three-factor cross in Salmonella typhimurium was performed using bacteriophage P22. The cross was between an arg-leu-his- recipient bacterium and bacteriophage P22, which was grown on an arg+leu+his+ strain. 1000 arg+ transductants were selected..
Most of the endosperm is missing from Capsella seeds that contain the largest embryos. Discuss what happened to the endosperm in these seeds?
A DNA strand in a double helix contain 34 mol-% A , 22 mol-% T , 18 mol-% C , and 26 mol-%G , what is the composition of the complementary strand?
Which of the following is NOT a trait shared between green algae and land plants?
Which of the following scenarios would NOT result in natural selection?
Traditionally, it was thought that nucleus was the control center of the cell. Recent discoveries though, indicate that the nucleus in eukaryotes is merely a repository of genetic data.
Early in development, most human cells turn off expression of essential component of telomerase, enzyme responsible for addition of telomere repeat sequences (5' TTAGGG 3') to the ends of chromosomes.
Which of the following is not a major function of the plasma proteins in the blood? 1. membrane permeability 2. clotting 3. osmotic balance 4. pH buffering 5. chloride ion levels
Identify the specific evolutionary adaptations that help diverse animals directly exchange matter between cells and the environment.
Assume you have achieved your dream and are now a prominent immunologist. One afternoon, while pondering which direction your research should take, you vividly remember the pain that the rusty nail incident caused.
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