With my biology background, I’m surprised I didn’t realize this sooner…
If Nalani were to give birth to a calf, assuming she’s not related to the father of her calf, the offspring wouldn’t be affected by inbreeding at all.
You receive half of your chromosomes from your mom and half from your dad. Because Nalani and her father were both Katina’s calves, Nalani likely has a few pairs of chromosomes that are identical to each other. This is when inbreeding becomes a problem, because harmful, recessive genes are more likely to be expressed when two chromosomes are exactly the same.
However, if she mated with an unrelated male, she would only pass down one set of chromosomes to her offspring, not both. If Nalani has a pair of chromosomes in her cells that contain harmful recessive genes due to inbreeding, it wouldn’t affect the calf because it wouldn’t be getting both pairs of chromosomes from her.
So, if Nalani becomes pregnant at any point in the future, I don’t want to see people complaining about the calf being inbred, lol (unless, of course, the father of the calf is related to Nalani.) And this goes for Adan and Keijo as well, if they ever have offspring.
I’m a bit confused, maybe I’m just not understanding something here. The chromosomes an individual passes down to their offspring are most likely a mix of the father and the mother’s, right? It’s not like we only inherit our grandfather or our grandmother’s DNA, if that were the case we could technically be genetic siblings with our uncles/ aunts. So isn’t it the overwhelming possibility that Nalani’s calf will inherit identical genes from both Taku and Katina?
That being said I don’t believe this level of inbreeding in this situation is cause for major concern. Should Nalani breed with an unrelated male, chances are the calf will be perfectly healthy.
Well not quite. Inbreeding can only occur if the two individuals are actually related. If two individuals are inbred, but un-related, the offspring are indeed not inbred. Granted the more inbred something is the greater the chance of them having reproductive issues that give them a hard time is. For instance, Giant otters used to be extremely in-bred in captivty (to the point where no pups were surviving more than a few days past birth), and once fresh animals were imported, those once failing animals started to produce healthy, vivacious pups.
Or if you want, you can refer to this coefficient of inbreeding chart, which shows that even if Nalani bred with Keijo, the calf would still be a healthy outcrossed animal with a 0% COI