First, let us look at how recombinants are detected experimentally. The detec- tion of recombinants in organisms with haploid life cycles such as fungi or algae is straightforward. The input and output types in haploid life cycles are the geno- types of individuals rather than gametes and may thus be inferred directly from phenotypes. Figure 3-11 can be viewed as summarizing the simple detection of recombinants in organisms with haploid life cycles. Detecting recombinants in organisms with diploid life cycles is trickier. The input and output types in diploid cycles are gametes. Thus, we must know the genotypes of both input and output gametes to detect recombinants in an organism with a diploid cycle. Though we Recombinants are meiotic output different from meiotic input Input A.B a.b 2n Meiotic diploid A/a B/b Meiosis A.B Parental (input) type Output Parental (input) type A. Recombinant Recombinant FIGURE 3-11 Recombinants (blue) are those products of meiosis with allele combinations different from those of the haploid cells that formed the meiotic diploid (yellow). Note that genes A/a and B/b are shown separated by a dot because they may be on the same chromosome or on different chromosomes.
First, let us look at how recombinants are detected experimentally. The detec- tion of recombinants in organisms with haploid life cycles such as fungi or algae is straightforward. The input and output types in haploid life cycles are the geno- types of individuals rather than gametes and may thus be inferred directly from phenotypes. Figure 3-11 can be viewed as summarizing the simple detection of recombinants in organisms with haploid life cycles. Detecting recombinants in organisms with diploid life cycles is trickier. The input and output types in diploid cycles are gametes. Thus, we must know the genotypes of both input and output gametes to detect recombinants in an organism with a diploid cycle. Though we Recombinants are meiotic output different from meiotic input Input A.B a.b 2n Meiotic diploid A/a B/b Meiosis A.B Parental (input) type Output Parental (input) type A. Recombinant Recombinant FIGURE 3-11 Recombinants (blue) are those products of meiosis with allele combinations different from those of the haploid cells that formed the meiotic diploid (yellow). Note that genes A/a and B/b are shown separated by a dot because they may be on the same chromosome or on different chromosomes.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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In Figure 3-11, if the input genotypes were a • B and A • b,
what would be the genotypes colored blue?
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