Biology
Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 18.6, Problem 2EQ
Summary Introduction

To determine: The expected results of Bateson and Punnett’s cross of F1 plants.

Introduction: Bateson and Punnett in the year 1911 conducted an experiment on sweet peas. They made a cross of sweet peas showing linkage between two different genes. In their study they took into consideration two traits- the flower color and pollen shape.

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. Genomes A, B, and C all have basic chromosomenumbers (x) of nine. These genomes were derivedoriginally from plant species that had diverged from each other sufficiently far back in the evolutionarypast that the chromosomes from one genome can nolonger pair with the chromosomes from any other genome. For plants with the following kinds of euploidchromosome complements, (i) state the number ofchromosomes in the organism; (ii) provide terms thatdescribe the individual’s genetic makeup as accurately as possible; (iii) state whether or not it is likelythat this plant will be fertile, and if so, give the number of chromosomes (n) in the gametes.a. AABBCb. BBBBc. CCCd. BBCCe. ABCf. AABBCC
Linkage Mapping Using a Trihybrid Testcross in Fruit Flies Remember the black, purple, and vestigial genes from Exercise 1? Now you're going to have to construct a map of the same region from trihybrid testcross data. The new map should be similar to the one from Exercise 1, but it won't be identical because we're starting with a new, independent data set. BLACK PURPLE VESTIGIAL TRIHYBRID TESTCROSS In the parental generation, you mate a pure-breeding wild-type female (bl+/bl*pu*/pu+vg+/vg+ with a pure-breeding black, purple, vestigial male (bl/bl;pu/pu vg/vg) to produce an F1 generation that is all wild-type (bl/bliput/pu;vg+/vg). Note that the F1 flies are all trihybrid. Next, you mate several F1 trihybrid females (bl/bl:put/pu;vg+/vg) with tester males, which are black, purple, vestigial (bl/bl;pu/pu;vg/vg). The offspring of this trihybrid testcross are: Phenotype Wild-type Black, purple, vestigial Vestigial Black, purple Purple, vestigial Black Purple Black, vestigial bl pu vg bl pu…
What is the order of genes on the chromosome?22. In the tubular flowers of foxgloves, wild-typecoloration is red while a mutation called whiteproduces white flowers. Another mutation, calledpeloria, causes the flowers at the apex of the stemto be huge. Yet another mutation, called dwarf,affects stem length. You cross a white-floweredplant (otherwise phenotypically wild type) to aplant that is dwarf and peloria but has wild-typered flower color. All of the F1 plants are tall withwhite, normal-sized flowers. You cross an F1 plantback to the dwarf and peloria parent, and you seethe 543 progeny shown in the chart. (Only mutanttraits are noted.)dwarf, peloria 172white 162dwarf, peloria, white 56wild type 48dwarf, white 51peloria 43dwarf 6peloria, white 5a. Which alleles are dominant?b. What were the genotypes of the parents in the original cross?c. Draw a map showing the linkage relationships ofthese three loci.d. Do the data provide evidence for interference? Ifso, calculate the…
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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY