Oh, everyone. Which of the following statements is true of a species that has a chromosome number of n=16. Okay. So first off, what do we know? What does 2n stand for? Remember that 2n means diploid, meaning 2 of each chromosome. And the diploid number here is 16. So let's write that down. So 2n=16. Now, what do we know about the haploid cells? Well, haploid is symbolized by simply an n. So to get n, simply divide 16 by 2, and you're going to get 8 chromosomes. A diploid cell of this species is going to have 16 chromosomes and a haploid cell of the species has 8 chromosomes. So knowing that, let's look at our answers.
Answer choice A says, the species is diploid, okay, perfect, with 32 chromosomes per cell. Remember, the diploid number is 16. It's not 32. So that's not the answer. Answer choice B says each haploid cell of the species has 16 chromosomes. Remember, that's not true either because we just mentioned that the haploid number is 8. So that's not what we're looking for. Answer choice C says each diploid cell of this species has 16 chromosomes from the father and 16 chromosomes from the mother. Well, if there's 16 from mom and 16 from dad in a single cell, that means there's 32 in total. And we know that can't be true because the diploid number is 16, not 32. So that's not the answer we're looking for.
Answer choice D says each diploid cell of the species has 8 chromosomes from the father and 8 chromosomes from the mother. Eight chromosomes from mom plus 8 chromosomes from dad equals 16 total chromosomes, which is the diploid number, making it a perfect answer. Thus, for this mystery species that happens to have diploid cells with 16 chromosomes, 8 of those chromosomes are coming from mom, and 8 of those chromosomes are coming from dad. Okay, everyone. Let's move on to our next video.
