Nobody knows why there are women and there are men?

Well that was very informative.

Most don't consider single cells single cell organisms as being living things

Really?

Most don't consider single cells single cell organisms as being living things- and viruses certainly aren't some viral assemblies includw proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. In cell division a parentcelldivides into two or more daughter cells usually occurs as part of a largercell cycle. Ineukaryotes, there are two distinct types of cell division; a vegetative division, whereby each daughter cell is genetically identical to the parent cell called mitosis and a reproductive cell division, where the number ofchromosomesin the daughter cells is reduced by half to produce haploidgametes ..
to go back to thecell cycle, mitosis in which, replicatedchromosomesare separated into two new nuclei. Cell division gives rise to genetically identical cells in which the total number of chromosomes is maintained. Usually, mitosis is preceded by DNA replication and followed by cytokinesis; which divides thecytoplasm,organellesandcell membraneof one cell into two newcellscontaining roughly equal shares of these cellular components.

In her world there is no reason to avoid incest, is there?

@SCR0071
Err, I think your wrong. Sex diamorphism is the mechanism evolution has fallen on to mix genes. Organisms that dont mix genes repoduce through dividing and are basically clones of the parent, like viruses.

Having mixed genes, that is not being a clone of one parent, proved useful to overcoming pathogens that are also evolving.

Every living thing on the planet inherts its chromosomes from both parents

Poor Prokaryotes, overlooked again, despite that they vastly outnumber all those Eukaryotes with their fancy-schmancy sexual reproduction (and do all the important stuff), pffft.

It isn't the male that solely determines the sex of a child- XX is a girl and XY for a boy - the chromosomes need to combine and that assignment is one last to be made.

Funny thing, though... you get males and females throughout the animal kingdom... goats, dogs, gorillas, aardvarks. Wonder why? There must be some reason, surely? Can't wait for scientists to figure it out.

The 'gender' does indeed come later (if at all).
Possibly some time in the sixth form? when the individual discovers hair dye?

Errr, I'm sorry, wtaf?!?! Did they cut out the bit where everyone starting laughing and she said she was joking???

Yes I did mean sex

Sex is determined upon conception. Spermatozoa carry either an X or a Y chromosome.

Incidentally, it's adenine, thymine, guanine and cytosine

Every cell in your body does not have an entire copy of DNA -you obviously don't comprehend the size of the genome, at fertilisation the inheritance is 50% chromosomes from parent 23 +23 and the assignment is complex because of dominance - just because it happens instantly does not mean it isn't complex

I’d never heard of this person and she does indeed seem very stupid.

" this is a complex and as a result gender is the last thing to be assigned."
Do you mean sex? Gender is social construct rather than biological fact.

sexual dimorphism, is a term for the differences in appearance between males and females of the samespecies it has nothing to do with inheritance- and you don't mix genes - they come as a sub set of chromosomes which do get mixed finally with regard to pathogens- how often do you find an individual with a one off natural immunity to a disease? Not very often that is genetic- it is your immune system that deals with pathogens.

Wow.
That's an impressive absence of basic education. I learned all about the birds and the bees at primary school.

this is a complex and as a result gender is the last thing to be assigned.

Err, I think you are a bit confused.

Every cell in the body has a whole copy of an individuals DNA except the germ cells (sperm or egg, otherwise called gammets) which have only 50% of the individuals DNA.
When a female (egg) large gammet combines with a male (sperm) small gammet it produces an individual with 50% of each parents DNA (but obviously 100% DNA needed to make the organism)
The sex of the individual is determined at conception (when the sperm and egg combine) so from the instant of the creation of the new organism.

The 'gender' does indeed come later (if at all).
Possibly some time in the sixth form? when the individual discovers hair dye?

Sex dimorphism is the best way evolution found to mix genes. Genes need to be mixed to counter the evolutionary arms race with pathogens.

Your welcome Elle (and I never even went to uni).

This woman is thick as mince

Evolution is a theory not law , but I agree with you generally- it is the code in our genes that determines the future generations of the species

Every living thing on the planet inherts its chromosomes from both parents- apples fir example have 17 - humans have 46.. in humans deixyribonucleic acid [DNA] the chemical compound that contains the genetic instructions that develop and direct the activity of the organism. They are made of two paired strands each is made ofbfour chemical units called nucleotides. The bases are adenine [A] rhyming [T] guanine [G] and cytogenetics [C] Bases on opposite strands pair specifically: A always with T and C always with G. In total our genome contains 3 billion of these pairs and they reside in the 23 pairs of chromosomes within the nucleus of all of our cells - each chromosomes contains hundreds to thousands of genes, these carry the instructions for making proteins - each of the circa 30,000 genes makes on average three proteins.

In human procreation the makes sends his genome to the female egg at the point of fertilisation 50% of the chromosomes from each parent must be assigned to next generation - this is a complex and as a result gender is the last thing to be assigned.

@NeedsCharging
I see many surprise pregnancies with cries of "I don't know how it happened"

OMG. We are heading for a very crazy time if this confusion of children continues. I'm really worried what they are teaching my DS in school. I'm going to make it a mission to find out

It's the new 'I don't see colour' innit?

And we all know how that ended up. She's going to be wincing in a couple of years.