Question

Please draw/show how chromosomes would be seen at the Metaphase I of Meiosis I for the individuals given below...

a) 2n = 4x = 12 allotetraploid

b) 4n = 4x = 12 autotetraploid

c) 3n = 3x = 9 autotriploid

d) 2n-1 = 11 allotetraploid monosomic 1A

e) 2n-1 = 7 diploid monosomic 3A

f) 2n+1 = 12 allotetraploid trisomic 2B

g) 2n+1 = 9 diploid trisomic 4A

h) 2n-2=6 diploid nullisomic 3A

Answer 1

Allotetraploid: Chromosome set 4 times that of a haploid organism.

Autotetraploid: Chromosome of four copies of single genome as a result of double ancestral chromosomes complement.

Autotriploid: 3 sets of chromosome with similar karyotype.

Allotetraploid monosomic: 3 sets of chromosome plus one monosomic chromosome.

Diploid monosomic: A diploid set of chromosome and a monosomic chromosome.

Allotetraploid trisomic: 4 set of diploid chromosome and two set of monosomic

Diploid trisomic: 2 diploid set of chromosome and 2 monosomic chromosome.

Diploid nullisomic: 2 sets of deploid chromosome.

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