If one species (2n=10) crosses with another species (2n=18), producing an allopolyploid offspring, what is the ploidy of the offspring? a. 2n=10 b. 2n=18 c. 2n=10 + 18=28 d. 4n=36 +20=56

Video transcript

Hi everyone here's our next question. It says an individual having two or more complete sets of chromosomes derives from from different species is referred to as a we've got four choices here. Auto polyp Lloyd, alot polyp Lloyd and employed. Arman employed. So we have two different species. So we've got um hybrid and they've got two or more complete sets of chromosomes. So it's a hybrid individual with chromosome doubling as part of that. So it's not as simple as just one set of chromosomes from uh the parent of one species, another set of chromosomes from the parent another species. There's actually chromosome doubling taking place in the reproduction. Now we have a little hint when we try and if we can't remember the term um with the prefixes here because our first two choices, we've got auto polyp Lloyd with the auto prefects and choice B. Is alot polyp Lloyd. Well, it's kind of handy to remember that. Auto as a prefix means self and alot as a prefix means different. So that kind of gives us a hint here and indeed the phrase, the term we want is choice be alot polyp Lloyd meaning. And we've got as well as our alot prefects. We've got polly meaning many. So right there we've got the hint. Different species uh multiple sets of chromosomes. Alot polyp Lloyd for our correct answer. So just to look at our other answers and understand why they're not correct choice A auto polyp Lloyd. Well again, we've got that self pre flex as well as many. So auto polyp Lloyd would be an individual with two or more sets of chromosomes but from the same species then so Choice A is not correct choice C. Is an employed and just refers to an incorrect number of chromosomes in an individual either too many or too few. So that's not our correct answer. Choice. D. Monoplane Lloyd. That's a little bit of a tricky concept. It means having a single set of chromosomes and we might wonder, well wait a minute. Isn't that hap Lloyd? Well, hap Lloyd more specifically is refers to like a gamut which has half the number of chromosomes in that there are in the somatic cells of the individual. So that's often or most often manipulate Boyd having just a single set. But you can have something like wheat where the hap Lloyd gametes that have half the number of cells in the somatic cells, half the number of chromosomes is in the somatic cells still have three sets of chromosomes because the somatic cells have six sets of chromosomes so manipulated specifically as a single set of chromosomes. Which is often happily but not always. But that's also not our correct answer. So again, for two or more complete sets of chromosomes derived from different species. That's choice B aloe polyp Lloyd. See you in the next video