In one type of animal, the gene for a long tail (T) is dominant over the gene for a short tail (t). Two animals with long tails are crossed, and 25% of their offspring have short tails. Which diagram correctly shows a Punnett square of this cross?

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.

Ascientific idea becomes valid when it is what?

How to farmers could ensure that they only grow white flowers