An equational division of mitosis is occuring for a diploid organism that has three heterologous chromosomes. One acrocentric, one metacentric and one telocentric. The organism is tetrahybrid and heterozygous for dominant and recessive alleles at four different loci. The parental genotypes were
An equational division of mitosis is occuring for a diploid organism that has three heterologous chromosomes. One acrocentric, one metacentric and one telocentric.
The organism is tetrahybrid and heterozygous for dominant and recessive alleles at four different loci. The parental genotypes were AAbbCCDD and aaBBccdd.
Locus A and B are on the telocentric chromosome. Locus C is on a metacentric chromosome. Locus D is on the acrocentric chromosome.
Part A: How many chromosomes are observed during anaphase?
Part B: For cells of this organism that undergo meiosis, how many tetrads are observed during metaphase I?
Part C: What is the n value for this organism?
Part D: How many distinct gametes are possible if this cell goes through meiosis but does not have any crossing over (chiasma) during meiosis I. Write reasoning clearly.
Part E: Draw one possible representation of the chromosomes in a cell after the equational division of meiosis. Include all centromeres, chromatids and alleles.
Step by step
Solved in 2 steps