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Recent questions in Biology
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What phenotypic or genotypic ratios typically result from crosses dealing with a single genetic locus?
asked
12 years
ago
in
Biology
by
anonymous
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0
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Which of the following statements is true regarding recombination between genes on homologous chromosomes?
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12 years
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Biology
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anonymous
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DNA termini without overhangs produced by endonuclease digestion are called
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12 years
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Biology
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anonymous
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A mutant allele of corn leads to absence of red anthocyanin pigment in the kernel (absence of anthocyanin results in a yellow color). The allele, however, is unstable, reverting quite late, yet often, in development. The expected phenotype of kernels
asked
12 years
ago
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Biology
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anonymous
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The rare enol form of thymine pairs with guanine. If a thymine enolization occurs during replication, what would be the mutational event?
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12 years
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Biology
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anonymous
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In a population in Hardy-Weinberg equilibrium the frequency of the allele for Hartnup disease is 0.008. What percentage of the population is homozygous for this allele?
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12 years
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Biology
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anonymous
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In a complementation test
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12 years
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Biology
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anonymous
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Consider a species with a diploid (2n) number of 20 chromosomes. How many chromosomes would be found in a monoploid body cell?
asked
12 years
ago
in
Biology
by
anonymous
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1
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6. The fundamental Mendelian process which involves the separation of contrasting genetic elements at the same locus would be called ___.
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12 years
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Biology
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anonymous
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The basic structure of a nucleotide includes the following components:
asked
12 years
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Biology
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anonymous
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In a cross of a round hybrid pea with a true breeding round parent (Ww x WW), what genotypic proportions would be observed in the offspring?
asked
12 years
ago
in
Biology
by
anonymous
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In the purple penguin, a series of alleles occurs at the p locus on an autosome. All alleles affect the color of the feathers. pd = dark-purple; pm = medium-purple; pl = light-purple; pvl = very pale-purple. The order of dominance is pd > pm > pl > pvl. If a light-purple female (heterozygous for very pale-purple), is crossed to a dark-purple male (heterozygous for the medium-purple), the ratio of phenotypes expected among the baby penguins would be:
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12 years
ago
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Biology
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anonymous
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A base change resulting in a codon specifying an amino acid which is different than in the wild-type polypeptide
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12 years
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Biology
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anonymous
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One Drosophila genotype P m/P m is crossed with another genotype p m/p m. If the genes are closely linked
asked
12 years
ago
in
Biology
by
anonymous
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The stage of the life cycle where all cells are haploid?
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12 years
ago
in
Biology
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anonymous
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Three-point test crosses
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12 years
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Biology
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anonymous
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13. Starting with a cross between AA and aa, the proportion of heterozygotes in the F2 progeny will be ___.
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12 years
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Biology
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anonymous
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Which of the following processes occurs in meiosis but not mitosis?
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12 years
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Biology
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anonymous
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The sporophyte is the dominant phase of an angiosperm life cycle?
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12 years
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Biology
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anonymous
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12. The sequence of one strand of DNA is 5
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Biology
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