The latest in human evolution.

[Aussie105]

3. DNA has a mind of it's own.

Drosophila melanogaster (fruit fly) has 8 chromosomes while some plants have hundreds.

Ophioglossum reticulatum, the adder’s-tongue fern, holds the record with up to 1,440 chromosomes.

In short, that number is irrelevant.

On the other hand . . . missing some human chromosomes or having 3 copies instead of two for some combinations on mating can be biologically disastrous.
In utero death or trisomy 21, for instance.

"Numerical Abnormalities

Numerical abnormalities occur when there is a change in the number of chromosomes. This can involve monosomy, where a chromosome is missing, or trisomy, where an extra chromosome is present.

Trisomy 21 (Down syndrome): Individuals have three copies of chromosome 21, leading to intellectual disability, characteristic facial features, and hypotonia in infancy.

Trisomy 18 (Edwards syndrome): Caused by an extra chromosome 18, resulting in severe intellectual disability, clenched hands, and rocker-bottom feet.

Trisomy 13 (Patau syndrome): Extra chromosome 13 causes intellectual disability, cleft lip/palate, polydactyly, and forebrain malformations.

Monosomy X (Turner syndrome): Females with only one X chromosome often have short stature and infertility. "