Biology, 03.03.2020 23:54 akornegay2
Two genes, A and B, each with two alleles, control cucumber fruit color. In examining the results of genetic crosses, you find that the following genotypes are associated with specific colors: AllA or Aa produces white, ala; B/B or ala; B/b produces yellow and ala; b/b produces green cucumbers.
A. Determine the genotypes, phenotypes and phenotypic ratios of the P1 and F1 when two doubly heterozygous plants are crossed.
B. What type of gene interaction is illustrated in this cross?
C. Which allele is masking the expression of which allele?
Answers: 3
Biology, 21.06.2019 20:00
Read the following scenario to answer the following question. over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution
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Biology, 22.06.2019 04:30
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Which would be the most useful source of evidence to support mcneill's contention?
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Two genes, A and B, each with two alleles, control cucumber fruit color. In examining the results of...
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