Biology

Biology, 12.10.2019 08:30, dulldiamondss2858

Aphenotype that results from a dominant allele must have at least dominant allele(s) present in the parent(s).

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History, 29.08.2019 13:00, isabelperez063

Which best describes a recessive allele? always inherited from a parent when a dominant allele is inherited from the other parent never inherited from a parent when a dominant allele is inherited from the other parent only determines phenotype when a dominant allele for the same trait is present does not determine phenotype when a dominant allele for the same trait is present?

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Biology, 16.10.2019 00:00, azibur3191

Agene is composed of two alleles. an allele can be either dominant or recessive. suppose that a husband and wife, who are both carriers of the sickle-cell anemia allele but do not have the disease, decide to have a child. because both parents are carriers of the disease, each has one dominant normal-cell allele (s) and one recessive sickle-cell allele (s). therefore, the genotype of each parent is ss. each parent contributes one allele to his or her offspring with each allele being equally likely. complete parts a) through c) below. a) genes are always written with the dominant gene first. therefore, there are two instances the offspring could have genotype ss (one if the mother contributes the dominant allele and the father contributes the non-dominant allele; and one if the father contributes the dominant allele and the mother contributes the non-dominant allele). list the other two possible genotypes of the offspring. nothing

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Biology, 29.10.2019 05:31, dee5896

Aphenotype that results from a dominant allele must have at least dominant allele(s) present in the parent(s).

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Biology, 30.10.2019 22:31, Daisysolis5191

Two genes interact to produce various phenotypic ratios among f2 progeny of a dihybrid cross. design a different pathway explaining each of the f2 ratios below, using hypothetical genes r and t and assuming that the dominant allele at each locus catalyzes a different reaction or performs an action leading to pigment production. the recessive allele at each locus is null (loss-of-function). begin each pathway with a colorless precursor that produces a white or albino phenotype if it is unmodified. the ratios are for f2 progeny produced by crossing wild-type f1 organisms with the genotype rrtt.12/ 16 white: 3/16 green: 1/16 yellowa) at least one copy of both dominant alleles results in white; at least one copy of one of the dominant alleles also results in white, but at least one copy of the other dominant allele produces green; and the absence of either dominant allele produces yellow.b) if both dominant alleles are present, the result is green. at least one copy of one specific dominant allele is required for yellow. if that dominant allele is not present, the result is white, regardless of whether the other dominant allele is present.c)at least one copy of each dominant allele results in white, at least one copy of either dominant allele produces green, and the absence of either dominant allele produces yellow.which statement is correct. explain step by step so i can do the rest!

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Aphenotype that results from a dominant allele must have at least dominant allele(s) present in the...

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