True / False for the following 1 ) Species that brood their young generally have lower...

True / False for the following

1 ) Species that brood their young generally have lower FST values than those with planktonic larvae.

2 ) Similar geographic patterns of population differentiation among species can be a signature of vicariance.

Expert Solution

1.

Here are some related facts:

FST in genetics is = Genetic distance value.
Lower FST value between population/species, higher is the breeding and lesser is the isolation from each other. Whereas, higher the FST value means no breeding is happening and isolation is present between population/species. The species which brood their young generally have a lower FST, it's true. Now, the species who have planktonic larvae, they will be having more widespread dispersal due to their floating nature, and they have lesser genetic variations and differentiation in them even over a large geographical dispersion.
Whereas, the limited dispersing (brooding ones), have a great genetic differentiation present in them with a greater population genetic structure in comparison to those with planktonic larvae.
Therefore, yes, the statement that "species that brood their young ones generally have lower FST (less isolation, more interbreeding) as compared to those who have planktonic larvae" (with more high dispersal ability have higher FST) and stay much more isolated with less genetic similarity and less variation.
the closer to the species, the lesser the genetic distance, the farther will have more genetic distance less intermingling and more isolated genes.
The FST value varies from 0 to 1, with 0 being higher interbreeding, less isolation, and 1 means no interbreeding and highly isolated.

Thus, the statement that 'Species that brood their young generally have lower FST values than those with planktonic larvae', is TRUE.

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2.

Vicariance is when a species gets differentiated into two due to a geographical or physical barrier between them, turning them into two new species who were originally one. The signature of vicariance means an indication that it is present. The process of vicariance creates the underlying mechanism of the diversities of distribution also.

A similar kind of geographical pattern of population differentiation seen among species can be a signature of vicariance. This is True.

gladiator answered 2 years ago

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