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- 26 of 40 21 22 23 24 25 26 27 28 29 30 Miller, Timia Polyploid plants form as a result of a beneficial mutation that often makes them larger and stronger than diploid plants. These plants form when a complete set of chromosomes fails to separate during meiosis creating plants with extra chromosomes. What type of mutation has this result? O frameshift O nondisjunction substitution O translocation https://student.masteryconnect.com/%3 9/0(d) Scientists believe that the yellow fern arose from hybridization with another fern on the island. Create a diagram of this hybridization that tracks the origin of the chromosome number in the yellow fern.. The two loci P and Bz are normally 36 m.u. apart on thesame arm of a certain plant chromosome. A paracentricinversion spans about one-fourth of this region butdoes not include either of the loci. What approximaterecombinant frequency between P and Bz would youpredict in plants that area. heterozygous for the paracentric inversion?b. homozygous for the paracentric inversion?
- 7. A geneticist has a strain of diploid plants. The gene orders for two of the chromosomes in this strain are AB.CDEF and KL.MNO. He subjects the plants to x-ray treatments and induces a reciprocal translocation between these two chromosomes. The translocation chromosomes are AB.CNO and KL.MDEF. Diagram the pachytene configuration in translocation heterozygotes.Compare and contrast pleiotrophy and phenocopyExplain the equation E+S---->ES----> E + P.
- 4 BO 5 A/ 2 3 How is '1' in the above leaf anatomy image modified in a xeromorphic leaf?11:52 and ry bod es loc he al alle omi Tomo tted es, wh Show cemplete nis ne n the type ratios for each generatio pes an Other problems: How do you know the genotype of organisms with a dominant phenotype? Is it homozygous or heterozygous? 8. A pea plant exhibits a purple color, but you are unsure of its genotype. With what could you cross this plant to determine its genotype? Show all of your work for the cross. What is this type of cross called? Incomplete dominance: Genes code for the production of specific proteins, many of which are enzymes. Different alleles at a locus code for alternative forms of a protein that differ in structure and when the protein is an enzyme, often have different degrees of catalytic activity. Therefore, a heterozygote genotvpe produces an intermediate phenotype.. An allotetraploid species has a genome composed oftwo ancestral genomes, A and B, each of which havea basic chromosome number (x) of seven. In thisspecies, the two copies of each chromosome of eachancestral genome pair only with each other duringmeiosis. Resistance to a pathogen that attacks the foliage of the plant is controlled by a dominant allele atthe F locus. The recessive alleles Faand Fbconfersensitivity to the pathogen, but the dominant resistancealleles present in the two genomes have slightly different effects. Plants with at least one FAallele areresistant to races 1 and 2 of the pathogen regardlessof the genotype in the B genome, and plants with atleast one FBallele are resistant to races 1 and 3 of thepathogen regardless of the genotype in the A genome.What proportion of the self-progeny of an FA Fa FB Fbplant will be resistant to all three races of the pathogen?