In mammals, the majority of cardiomyocytes (cardiac muscle cells) undergo repeated dna replication without cytokinesis as a part of normal development, and in response to injury or heart attack. many cardiomyocytes are tetraploid, and some cells have even higher dna content. this variation in dna content is an example of
a. alloploidy.
b. aneuploidy.
c. endopolyploidy.
d. copy number variation.

C. endopolyploidy

Explanation:

Endopolyploidy occurs in cardiomyocytes cycles that are often known to have variants of DNA content.

the genotypes would be 50% bb and 50% bb

the phenotypes would be 50% brown and 50% white. hope this : )

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.