Species I is diploid (2n = 6) with chromosomes AABBCC; a related Species II is d

Question

Species I is diploid (2n = 6) with chromosomes AABBCC; a related Species II is diploid (2n = 6) with chromosomes MMNNOO. Indicate the chromosomes that would be found in individuals with the following chromosome mutations.

a. trisomic for chromosome A
b. tetrasomic for chromosome N
c. an autotriploid of Species I
d. an allotetraploid
e. an autotetraploid of species II
f. monosomic for chromosome B
g. a double trisomic for chromosomes A and C
h. a nullisomic for chromosome O Species I is diploid (2n = 6) with chromosomes AABBCC; a related Species II is diploid (2n = 6) with chromosomes MMNNOO. Indicate the chromosomes that would be found in individuals with the following chromosome mutations.

a. trisomic for chromosome A
b. tetrasomic for chromosome N
c. an autotriploid of Species I
d. an allotetraploid
e. an autotetraploid of species II
f. monosomic for chromosome B
g. a double trisomic for chromosomes A and C
h. a nullisomic for chromosome O

Explanation / Answer

Species I is diploid (2n = 6) with chromosomes AABBCC

Species II with diploid (2n = 6) with chromosomes MMNNOO

Tetra      means four

a. trisomic for chromosome A--------------(2n+1) condition
             AAABBCC

b. tetrasomic for chromosome N---------------(2n+2) condition
MMNNNNOO

c. an autotriploid of Species I-----------------(3n) condition
             AAABBBCCC

d. an allotetraploid---------------------(2n+2n)
AABBCCMMNNOO
allo-----------different species

auto-----same

f. monosomic for chromosome B---------(2n-1) condition
AABCC

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