Question

chromosomes, with just two homologous pairs, making n-2 (haploid) and 2n -4 (diploid). Two unlinked gene loci affect flower color in this species. At the P locus found on the larger of the two chromosome pairs, the dominant P allele causes pigment to be deposited in the petals. The recessive p allele. when homozygous, results in no pigment being placed in the petals, leading to flowers with white petals. The Y locus, found on the smaller of the two chromosome pairs, determines the type of pigment produced. The dominant Y allele leads to the production of yellow pigment, while the recessive y allele, when homozygous, leads to the production of pigment. Thus, a plant with the genotype YY or Yy will have yellow petals (like one shown at right), but only if tis genotype at the P locus is PP or Po D Consider again the F1 chr Y loc possible for the Fis in the impossible. Study each diagram carefullythen indicate (by clis al these F1s in either mitosis, meliosis 1, or melosis 2. Each black line represents ht on a particular chromosome or chromatid. Some of the portrayed allele arrangements may particular anaphase shown, but other portrayed allele arrangements may aircling) (1) whether the diagram indicates an F1 is, Meiosis 1, or Melosis 2, (2) whether the allele arrangements shown are possible or impossible for the type of anaphase portrayed, and (3) briefty explain your answer (12 ponts 1. Mitosis Melosis 1 Melosis 2 Possible Impossible 2. Mitosis Meiosis 1 Meosis 2 Il Possible Impossible 3. Mitosis Meiosis 1 Meiosis 2 I Possible Impossible 4. Mitosis Meiosis 1 Melosis 2 II Possible Impossible s. Mitosis Melosis 1 Melosis 2 II Possible Impossible Mitosis Melosis 1 Meiosis 2 Il Possible Impossible
The F1 generation is all yellow

Answer 1

1- meiosis 1 possible , a cross over must have occured in P locus . There was no cross over in Y locus , thus sister chromatid in p allele are exachanged .

2-mitosis impossible , as the sister chromatid have recombination , mitosis doesnot show recombination.

3-meiosis 2 possible , again the sister chromatid has P on one and p on other are separating and forming allele.

4-meiosis 1 impossible the Y locus doesot have Y allele and they just have y allele , they cannot produce yellow offspring

5-mitosis possible as the sister chromatid separate and the each chromosome have its own copy seprataing

6-meiosis 1 possible as the homologous chromosome sepratae and move a part has PpYy genotype .