ch 15

Question 1

Aneuploidy

Answer 1

has missing or one or more chromosomes having one or more extra chromosomes.

Question 2

Nondisjunction

Answer 2

: chromosomes fail to properly separate during meiosis and can happen in meiosis 1 with homologous chromosomes or meiosis 2 with sister chromatids(can produce viable offspring- diploids). Rarely in mitosis.

Question 3

Polyploidy

Answer 3

having three or more complete sets of chromosome

Question 4

Autoploids

Answer 4

: polyploid that derives all its chromosome sets from the SAME species. There can be tetraploids that can form during prophase when the pairs come together during line up in metaphase.

Question 5

Alloploids

Answer 5

poly that derives its chromosomes from sets of 2 or more distinct, RELATED species.

Question 6

why can aneuploids in sex chromosomes survive better than autosomal chromosomes?

Answer 6

-x-inactivation; there are people with less or more sex chromosomes and PAR regions remain active.