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In cattle, roan coat color (mixed red and white hairs) occurs in the heterozygous (Rr) offspring of red (RR) and white (rr) homozygotes. Which of the following crosses would produce offspring in the ratio of 1 red : 2 roan : 1 white?
A. red × white
B. roan × roan
C. white × roan
D. red × roan
E. The answer cannot be determined from the information provided.
For a specific type of cell after 3 hours, the concentration of cells per ml of solution is about 400/mL. After 10 hours the concentration has gone up to 2000/mL.
Explain the "midgut barrier hypothesis" in mosquito borne arborviruses that accounts for different transmission rates or "competencies" among mosquito borne-viruses.
You travel to an island to learn about habitats & relationships of spiders centerpides & insects. You plot out five different areas of the island & count the numbers of spiders, centerpides, & insects living in each plot.
X-linked Recessive: colour-blindness, malepatterned baldness, hemophilia Color-blindness is caused by a recessive gene (b) on X chromosome. Predict phenotypes for children of a female carrier with a normal male. A genetic wasteland.
What will be the net charge of a typical water-soluble protein at pH 3? Briefly describe how you arrive at your answer. Which residues will carry this charge?
Each chromosome consists of only one centromere, but during certain times in the cell cycle could consist of two DNA molecules (sister chromatids). If a cell in G1 of interphase has 8 chromosomes, then in G2 of interphase, how many chromosomes AND..
Compared to a carbon atom with only single covalent bonds, a carbon with a double bond 1 Shares fewer electron pairs with other atoms two Is more flexible in the spatial arrangement.
germination of fern spores does not require mRNA synthesis for protein synthesis. Propose a mechanism that would allow germination without mRNA synthesis in the spore.
In many organisms including human, some tissues are triploid rather than diploid. The c value for human is 3 x 10^9 bp and a normal diploid cell contains 46 chromosomes. From this information please determine how many chromosomes will be visible i..
Biological recognition is significant in many processes explain how the process of recognition occurs while an organism recognizes other members of their own species.
Chris wanted to test the effect of diet pills on how tall the tomato plants in his garden would grow. He took two pots, filled them with dirt from the same bag, and planted four tomato plants in each.
A maternal effect gene in Drosophila, called torso, is found as a recessive allele (t) that prevents correct development of the anterior- and posterior-most body structures.
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