Biology

Biology, 13.11.2019 22:31, saykblahwah309

What must the genotype look like for an organism to show a recessive trait?

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Biology, 13.07.2019 02:30, michellealvarez985

How is a recessive allele different from a dominant allele? a. some recessive alleles can show up even if they are not in the genotype. b. a recessive allele does not always determine the trait. c. only one recessive allele is enough to affect the trait. d. a recessive allele always determines the trait.

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Biology, 18.08.2019 15:20, elizebeth4501

Atest cross with an organism with a homozygous recessive genotype results in 50% of the offspring exhibiting the recessive trait. what is the genotype of the test-cross parent? i. homozygous recessive ii. homozygous dominant iii. heterozygous a. i only b. ii only c. iii only d. i or iii e. ii or iii

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Biology, 13.09.2019 03:30, sydneydavis57

For pedigree problems, use the tips in figure 14.15 and below to determine what kind of trait is involved. a. if parents without the trait have offspring with the trait, the trait must be recessive and the parents both carriers. b. if the trait is seen in every generation, it is most likely dominant (see the next possibility, though). c. if both parents have the trait, then in order for it to be recessive, all offspring must show the trait. d. to determine the likely genotype of a certain individual in a pedigree, first label the genotypes of all the family members you can. even if some of the genotypes are incomplete, label what you do know. for example, if an individual has the dominant phenotype, the genotype must be aa or aa; you can write this as a–. try different possibilities to see which fits the results. use the rules of probability to calculate the probability of each possible genotype being the correct one.

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Biology, 22.10.2019 20:20, samy14

Why is a testcross necessary to determine genotype when an organism shows a dominant trait? a. phenotype has nothing to do with genotype. b. an organism with a dominant trait will always have two dominant alleles. c. an organism only needs one dominant allele to show the dominant trait. d. testcrosses aren't required when dominant traits are present

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