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Height of spikeweed plants results from polygenic inheritance. Three genes control height, and each dominant "height" allele adds 5cm to the base height of the plant which is 10cm (i.e. a plant with no "height" alleles is 10cm tall). If a plant is homozygous "tall" at each locus the plant will be 40cm tall. A 40cm plant is crossed with a 10cm plant to produce F1 progeny. How tall are the plants in the F1 generation?
How many phenotypic classes (different heights) will there be in the F2 generation (a general answer is sufficient - you do not need to do the 64-square Punnett square)?
if you are performing this test on an unknown organism, why is it a good idea to run simultaneous tests on known phenylalanine-positive and phenylalanine-negative organisms in.
What is a Barr body? What determines which of the X chromosomes gets inactivated in a human female cell? Is the same X chromosome inactivated in all female cells?
Determine at least three benefits of the genetically modified bacteria described in the article. Give your opinion on what risks the genetically modified bacteria may pose to those receiving the cancer treatments.
Two treu breeding white strans of a plant were mated and the Ftwo progeny were all white. When the F1plants were allowed to self fertilize, 179 white flowered and 41 purple flowered F1 plants grew.
Explain how sexual reproduction in plants illustrates alternation of generations. Include the processes involved and include at least one type of plant to illustrate your answer.
what are the methods bacteria use to take up foreign DNA.
Hemophilia is a sex-linked trait. A normal woman whose father has a hemophilia marries a normal man. What is the chance for their children to have the trait? Give the full explanation - genotypes of all involved.
Describe what you observed in your plaque smear wet mount, direct stained slide and indirectly stained slide. What were the similarities? Describe the three main steps to clone a gene into an organism.
In an experimental situation, a student researcher inserts an mRNA molecule into the cytoplasm of a eukaryotic cell after she has removed its 5' cap and poly-A tail.
Would this estimate be accurate if offspring and parents received a different diet? Explain.
Determine which of the following structures are present in both prokaryotic and eukaryotic cells? Plasma membrane, Golgi apparatus, DNA, Lysosomes, Perioxisomes, Cytoplasm.
Why is an action potential conducted in only one direction, from an axon hillock to an axon terminal?
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