Question

Euploidy is best explained by
A)One chromosome less than the haploid set of chromosomes
B)Exact multiples of a haploid set of chromosomes
C)One chromosome more than the haploid set of chromosomes
D)One chromosome more than the diploid set of chromosomes

Answer 1

Euploidy is a chromosomal anomaly in a cell or an organism that includes the whole collection of chromosomes. Euploidy is accepted more often in plants than in species. A single set (monoploidy), two sets (diploidy), or multiple sets can occur (polyploidy, i.e. triploid, tetraploid, pentaploid, hexaploid, etc.).

Complete answer:
Euploidy is a chromosomal anomaly in a cell or an organism that includes the whole collection of chromosomes. Euploidy is accepted more often in plants than in animal species. A single set of chromosomes (monoploidy), two sets of chromosomes (diploidy), or many sets (polyploidy, i.e. triploid, tetraploid, pentaploid, hexaploid, etc can be present.

Autopolyploidy and allopolyploidy are more examples of euploidy. There is an extra group of chromosomes in autopolyploidy, which may be from a parent or similar paternal species (i.e. a single taxon). The autopolyploid cell or organism is referred to as an autopolyploid. Tolmiea menzisii (piggyback plant) and Acipenser transmontanum are natural autopolyploids. The extra set of chromosomes in allopolyploidy comes from another animal (i.e. from two or more diverged taxa). The cell or organism is referred to as allopolyploid in the allopolyploid state. Wheat is an example, with six chromosome sets, of an allopolyploid.

Hence, the correct answer is option (B)

Note: Aneuploidy is defined as the inclusion of one or more additional chromosomes or the lack of one or more chromosomes other than several of the basic chromosome numbers. The heritable disorder of having more than two total sets of chromosomes is polyploidy.