00:01
For this question, we're given a few options.
00:03
So what is the basis of variation in traits? variation in what? so karyotype is an option.
00:09
Karyotype is actually just the number of chromosomes we have.
00:13
And so the number and like the size and the shape of chromosomes.
00:16
And they do matter, but just the variation in that is not like the basis of variation in traits.
00:22
The variation in traits can change that or like variation in smaller parts can change that.
00:28
And that's not like the base variation.
00:30
Dna sequence is the right answer.
00:32
So a dna sequence can code for a protein, right? so you change like this t into a g, for example, then that will affect what this protein codes for.
00:45
And that will make a different protein with a different function, and that will cause this cell or this organism to have a different phenotype.
00:53
The double helix, all dna strands form a double helix...