Ahypothetical population of a trout lives in a lake in california. the fish in this population have two color phenotypes, brown and white. both phenotypes are relatively equal in the population. in this species, scale color is controlled by different alleles for the same gene. the population in the lake is isolated from other populations of trout as there are no rivers or streams connecting the lake to other bodies of water. one winter, a rockslide on a cliff bordering the lake kills half of the fish living in the lake. by random chance, the majority of the fish killed in the rockslide have the white phenotype. several years later, a scientist studying the population of trout in the lake observes that there are no more white fish present in the lake. what is most likely responsible for the change in phenotypic frequency of trout in the lake?

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

The cluster of developing cells from conception until birth is called an

The first generation of offspring from the cross of two parents is called the a.f1 generation b.f2 generation c.short generation d.p generation