How does an embryo end up with 3 copies of a chromosome?

Abnormal chromosomes most often happen as a result of an error during cell division. Chromosome abnormalities often happen due to one or more of these:

Errors during dividing of sex cells (meiosis)

Errors during dividing of other cells (mitosis)

Exposure to substances that cause birth defects (teratogens)

Explanation:

pls give me brainliest baby girl :)

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.

acceleration = 18/3 = 6 m/s per second.

hope i

-lavira: )