The Lyon hypothesis attempts to explain the molecular mechanism of _________(blank).

Brown spotting of the teeth in humans is caused by a dominant X-linked gene. If a male with normal teeth marries a female with brown teeth who’s male parent had normal teeth, then _________(blank) of their female offspring will have brown teeth.

If a geneticist describes a trait as being 70% penetrant, what would that mean?

Mendel’s work with single-factor crosses: What resulted from Mendel’s work with single-factor crosses?

At the molecular level, which of the following best explains heterozygous advantage?

Looking at this image, use sentences to determine a. (1 pt) if this is a prokaryote or eukaryote? Be sure to explain why you think this. b. (3 points) Roughly, how many cells in this image are CLEARLY in prophase (you do not need to count any cells that are hard to see)? Explain why you think this based on what you know about prophase (what to look for) AND how it differs from interphase. The explanation is more important than your actual numerical answer.  c. (2 points) State if one or more cells are CLEARLY in metaphase? Explain why you think this based on what you know about metaphase (what to look for). The explanation is more important than your actual numerical answer.  d. (2 points) State if one or more cells are CLEARLY in anaphase? Explain why you think this based on what you know about anaphase (what to look for).  The explanation is more important than your actual numerical answer.  e. (2 points) Scientists are subjective, but aim to be objective. Explain how this COS relates to any possible answers for parts B, C and D. Be sure to explain BOTH subjective AND objective. 

Embed your work for #1 – 2 (no links will be graded): CLEARLY SHOW THE METHOD USED AND THE STEPS INVOLVED IN ARRIVING AT YOUR ANSWERS.  It is to your advantage to do this, since you may obtain partial credit if you do, and you will receive little or no credit if you do not.  Attention should be paid to significant figures. Access the upload option: After finishing your test, go to the last question and select the “record upload media” option; Switch to your webcam: Ensure your webcam is plugged in and switch to its view within the assessment interface; Prepare your environment: Make sure you have good lighting (e.g., a desk lamp or natural light from a window) and maintain an optimal distance of 6-8 inches between your camera and your paper; Record “video pictures”: Start recording, immediately hit “finish” after the countdown to take a snapshot of your work, and then save the media; Ensure clarity: Take your time when recording to avoid blurry or mushy images. Do not hold your paper, as this can cause the webcam to shake and result in unclear pictures; Submit multiple images if needed: If your teacher requires more than one picture or images from different sections, you can add additional “video pictures”; Review your submission: Before finalizing, double-check that the images you’ve provided are clear and make sense; Submit your test: Once all questions are answered and your work is uploaded, scroll to the end of your test and hit submit.   Video If there is an issue with submitting your handwritten work via your side-angle camera (or if the images do not look clear), you will close the assessment and immediately upload your work to the “comments” box of the closed assessment.

Which of the following causes a false decrease in packed cell volume?

The normal packed cell volume in dogs is about?

Which instrument is used to measure the total protein content of a sample?