On the planet of caracas, in the stellar solorais kachunka galaxy, there is a population of nuggetarians. two phenotypes of interest are:
(i) peanutus; and
(ii) carmelaoid.
each is a single gene trait, and for each gene there are two alleles. a cross between a female with peanutus and a male with carmelaoid (each of which is homozygous for the wild-type (non-trait) allele at the other gene) produces the following f1 counts: phenotype01 phenotype02 number of males number of females wild-type wild-type 523 510 peanutus wild-type 0 0 wild-type carmelaoid 497 513 peanutus carmelaoid 0 0 the mode of inheritance for each phenotype is: a. peanutus = autosomal dominant. carmelaoid = autosomal recessive. b. peanutus = autosomal dominant. carmelaoid = autosomal dominant. c. peanutus = autosomal recessive. carmelaoid = autosomal dominant. d. peanutus = autosomal recessive. carmelaoid = x-linked recessive. e. peanutus = autosomal recessive. carmelaoid = autosomal recessive. reset selection

Over the past 60 years, many amphibian species have experienced significant population declines and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. chytridiomycosis is a fungal disease first identified in 1998 as a cause of massive amphibian deaths. in some severely impacted populations, a few individuals have survived, perhaps because of some natural resistance. if these resistant individuals continue to survive and prosper, new resistant populations might emerge. this would be an example of the founder effect artificial selection genetic drift natural selection sexual selection

Sediment layers stop lateral spreading when: they encounter a barrier they encounter an opposing current they run out of additional sedimentary material

Me the formula cacl2 represents the compound