GENETICS help?

Question

1) What evidence exists that humans with aneuploid karyotypes occur at conception, but are usually inviable?

2) For a species with a diploid number of 18, indicate how many chromosomes will be present in the somatic nuclei of individuals who are haploid, triploid, tetraploid, trisomic, and monosomic

Answer 1

1) The evidence that the aueuploid karyotype occur at conception when the fetus (usually inviable and sponataneously aborted) have all cells that have the aneuploid karyotype. Aneuploidy that occurs after conception, like during cell division, would cause the mosaicism --> some cells have the aneuploid karyotype while others don't have

2)
haploid: 9
triploid: 27
tetraploid: 36
trisomic: 19
monosomic: 17

Answer 2

Evidence of fewer or more chromosomes than usual is that they die, usually.

2 haploid=9
triploid=58
and so on.