Each box shows a different type of meiosis in yeast, characterized by the crossovers that occur between the ARG3 and URA2 genes. Drag each type of meiosis to the type of tetrad that would result. arg3 arg3 ARG3 ARG3 arg3 NCO arg3 ARG3 ARG3 arg3 arg3 ARG3 ARG3 Reset ura2 SCO ura2 URA2 URA2 DCO 3-strand #2 ura2 ura2 URA2 URA2 ura2 ura2 URA2 URA2 arg3 arg3 ARG3 XX ARG3 arg3 arg3 ARG3 ura2 DCO 4-strand ARG3 ura2 URA2 arg3 arg3 ARG3 URA2 XX ARG3 ura2 ura2 URA2 DCO 2-strand URA2 ura2 ura2 URA2 URA2 DCO 3-strand #1 Parental Ditype (PD) Tetratype (T) Nonparental Ditype (NPD)
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- A heterozygous diploid yeast Aa Bb went through meiosis. What percentage of the haploid spores will have recombinant combinations of alleles? What if genes A and B are unlinked? Explain What is genes A and B are linked? ExplainTwo yeast strains were mated. One was red with mating type A the other was red+ with mating type B. The resulting diploids were induced to undergo meiosis and the meiotic products of the diploids were as follows: 41 red+ B 43 red A 10 red+ A 6 red B How many map units separate the RED gene from the mating type gene? (just write the number, no units please)Imagine a germ cell for an animal that is 2n=4. Gene A and B are found on chromosome one, and the cell is homozygous for A(AA) and heterozygous for Bb. Gene D is found on chromosome 2 and the germ cell is heterozygous for the Allee of the gene (Dd). Meiosis for this germ cell results in the following four gametes, and one crossing over event during meiosis ABD, ABd, AbD, Abd. Draw the chromosomes in cell during metaphase of meiosis 1. Make sure to include chromosomes, the allele in the correct locations on the chromosomes AFTER the crossing over event, and spindle fibers.
- A sexually reproducing organism has the following phenotype DdEeAaTt: The D and E loci are on the same arm of a metacentric chromosome in cis configuration. The A locus is on the long arm of an acrocentric chromosome and the T locus is on a telocentric chromosome. There are no other chromosomes. Using diagrams, show a cell at metaphase of mitosis and show the results of mitosis. Ensure you show the location of the gene loci on the different chromosomes.A sexually reproducing organism has the following phenotype DdEeAaTt: The D and E loci are on the same arm of a metacentric chromosome in cis configuration. The A locus is on the long arm of an acrocentric chromosome and the T locus is on a telocentric chromosome. There are no other chromosomes. 1. What is the haploid number of this organism? 2. Using diagrams, show a cell at metaphase of mitosis and show the results of mitosis. Ensure you show the location of the gene loci on the different chromosomes.Shown below are photomicrographs of Rhoeo tradescantia cells undergoing meiosis. Answer the following question for each of the photomicrographs: Identify the cytogenetic abnormality observed (ex. ring, chain, laggard, bridge). Identify the meiotic stage in which these aberrations are observed (as shown in the photomicrograph). Explain how these aberrations are formed and relate to the possible causal mutation(s). Will this result to sterile and/or fertile gametes? Explain.
- Picture name - Tradescantia spathacea meiotic cell. HPO (400x)Shown below are photomicrographs of Rhoeo tradescantia cells undergoing meiosis. Answer the following question for each of the photomicrographs: Identify the cytogenetic abnormality observed (ex. ring, chain, laggard, bridge). Identify the meiotic stage in which these aberrations are observed (as shown in the photomicrograph). Explain how these aberrations are formed and relate to the possible causal mutation(s). Will this result to sterile and/or fertile gametes? Explain.An individual heterozygous for a reciprocal translocation possesses the following chromosomes: A B • C D E F G A B • C D V W X R S • T U E F G R S • T U V W X Q. Diagram the alternate, adjacent-1, and adjacent-2 segregation patterns in anaphase I of meiosis.A diploid species has 3 pairs of chromosomes in the somatic cells. In males, the first pair is large submetacentric; the second is medium acrocentric, and the third is small telocentric. In females, the first two pairs are like those of the males while the third is large metacentric with satellite. Illustrate the karyograms of the following: a. A triploid cell in femalesb. tetrasomic cell in malesc. tetraploid cell in females
- Two strains of yeast were mated – each with different alleles for two loci - color and growth rate. One strain of yeast was red/fast and the other was purple/slow. The meiotic products (progeny) are listed below Count among progeny Color Growth Rate 80 red fast 88 purple slow 18 red slow 14 purple fast What is the distance (in map units) between the color and growth loci?Consider the following meiocyte in metaphase I. Solid black lines indicate spindle microtubules. Assume blue chromosomes represents paternal chromosomes and green maternal chromosomes. A student determines the possible gametes that he/she believes can be produced from this cell, and provides you with the following options. Note that the alleles of each proposed gamete is contained within a set of brackets.Gamete 1: (abDe) Gamete 2: (DdEe) Gamete 3: (AaBb)Gamete 4: (DedE) Gamete 5: (aBdE) Gamete 6: (abdE)Gamete 7: (abAB) Gamete 8: (AbDe) Gamete 9: (dEab) i) How many DNA molecules were present in this cell at the start of the S-phase?ii) How many chromosomes will be present in each cell during Anaphase II? iii) Choose two of the proposed gametes that were produced by crossing over. Provide a reason for the gametes that you…Saccharomyces cerevisiae is a ____Budding yeast have two mating types: _______.-cells. The expression of________. observed in this experiment after a _______. cross was made. Diploid cells contain_________. of the number of chromosomes found in haploid cells. The number of yeast haploid strains used in this experiment to make the dihybrid cross is _________ When a diploid cell undergoes mitosis, the number of chromosomes in the resulting cells ________ When a diploid cell undergoes meiosis, the number of chromosomes in the resulting cells are __________ The result of __________. is the formation of gametes. Alleles are alternate forms of a __________ A heterozygous organism for a specific trait will express the phenotype determined by the _________. allele. If two alleles separate during meiosis and gamete formation, then this is an example of Mendel’s Law of _________ In yeast, the alleles for colony colour and tryptophan dependence are located on different chromosomes.…