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Down syndrome is usually caused by:

In a mapping experiment with three genes, which phenotype should occur least often in the F2 offspring?

Please show the area around your desk/table. This is not a 360o room scan. I only need a view of the area around your computer, similar to the image below.  

What was the Avery et al. (1944) contribution to the understanding of molecular biology?

Breakage at fragile sites, such as the Fragile X site, is correlated with having a large number of copies of a 3-base repeat, but is caused by:

You conduct a series of two-point mapping crosses involving five genes, named A through E, located on chromosome III. Given that gene A is at the end of the chromosome, what is the order of these genes along the chromosome, based on the ten percentages of recombinant offspring below as discovered in your experiments? A-B 23.5%,  C-A   9.0%,  C-B 14.5%,  D-C 14.0%,  D-A   9.5%,  D-B 14.0%,  E-B   6.8%, E-A 16.7%,  E-C   7.7%,  E-D   7.2%

A nursing student is studying the stages of labor and learns about the third stage. Which of the following accurately describes the third stage of labor?

Using no fewer than three works of literature covered thus far as evidence, discuss what it meant/means to be an American. (minimum of 200 words and 10 meaningful factual inclusions to support your assertions). In this response, I will be looking for solid general observations, but general observations carry little weight if they aren’t supported by factual inclusions specific to our required reading. Since this is not open book, I will not be looking for exact quotes or page numbers, but you should be able to paraphrase content well enough to offer particular support from our authors to your broader claims.

What explorer’s 1527 expedition resulted in encountering numerous Native American tribes along the Gulf Coast, including Eastern Texas?

What religion was Winthrop?