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In cucumbers, dull fruit (D) is dominant over glossy fruit (d), orange fruit (R) is dominant over cream fruit (r), and bitter cotyledons (B) are dominant over nonbitter cotyledons (b). A plant homozygous for dull, orange fruit and bitter cotyledons is crossed with a plant that has glossy, cream fruit and nonbitter cotyledons. Two of the F1 plants are crossed to each other to produce the F2 generation.
(a) Give the phenotypes and their expected proportions in the F2 generation.
(b) An F1 plant is crossed with a plant that has glossy, cream fruit and nonbitter cotyledons. Give the phenotypes and expected proportions among the progeny of this cross.
The ph of mitochondria matrix is 8.2 while the ph of intermembrane is 7.2. Determine the voltage potential across the mitochondrial membrane which would prevent hydrogen ions from flowing into matrix?
Create a cohesive paragraph about proteins explaining their chemical content, structure, and general properties. In discussion, describe the general chemical structure of an amino acid.
About 5 percent of individuals with Down syndrome have a chromosomal translocation in which a third copy of chromosome 21 is attached to chromosome 14. If this translocation occurred in a parent's gonad, how can it lead to Down syndrome in a child.
What is the phenotypic ratio you would expect to see in the F2 generation if you were following a sex-linked trait? An autosomal trait? Two autosomal dominant characters (dihybrid cross).
Results of this analysis show that one of the most rapidly reassociating classes of DNA is substantially reduced in the older individual with respect to the 2 year-old. How can you describe this finding.
Both directional and stabilizing selection affect the additive variance in quantitative traits. Given their effects, how much additive genetic variance do we expect to find in traits that affect fitness?
Mycoplasmas are the simplest self-replicating (free-living) bacterium known. The Mycoplasma genitalium genome is 580,000 bases in length. Approximately how many genes does this bacterial genome encode.
During exposure to elevated glucose, a yeast cell's membrane glucose transporters will rapidly increase so the cell can import glucose. Which would represent the yeast cell response.
Max's regular exercise regimen has reduced his high blood pressure, allowing him to achieve normal blood pressure on a single antihypertensive medication.
A scientist randomly separated a group of 100 lab rats into two groups of 50. One group was fed regular rat chow while the other was fed the same quantity of rat chow with added ddt. Both groups were housed in the same room with the same environmenta..
It may be possible in future to cure genetic disorders by genetically modifying individuals. For example, inserting functional copies of genes that are implicated in some forms of inherited breast cancer.
Dozens of potato varieties exist, differing from each other in potato-tuber size, skin colour, flesh colour, and shape. One might construct a classification of potatoes based on these morphological traits. Which of these criticisms of such a classifi..
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