Afamilial form of hypoparathyroidism is caused by a single point mutation in the gene encoding the preproparathyroid hormone. as a consequence of this point mutation, the signal sequence cannot be cleaved from the prepro-form of the mutant hormone. which statement below best describes the effect of this mutation upon synthesis of the preproparathyroid hormone? a) mrna encoding the mutant preproparathyroid hormone would accumulate in the nucleus and not be transcribed. b) the mutant preproparathyroid protein would not be targeted to the endoplasmic reticulum and thus would be translated by free ribosomes in the cytoplasm. c) the mutant preproparathyroid hormone would be incorrectly folded in the endoplasmic reticulum. d) the mutant preproparathyroid hormone would be inserted into the plasma membrane of the parathyroid cells. e) the mutant preproparathyroid hormone could not be stored in secretory vesicles, but instead would be secreted immediately following synthesis.

In a hypothetical breed of dogs, coat color is controlled by two genes. there are six different coat colors in this breed: black, brown, cream, gray, silver, and tan. consider the following crosses.cross 1: black females from a lineage of all black dogs are crossed with brown males from a lineage of all brown dogs. f1 males and females are all black. when f1 are intercrossed, f2 males and females are black or brown.cross 2: black females from a lineage of all black dogs are crossed with tan males from a lineage where all males are tan and all females are cream. f1 males are black, f1 females are gray. when f1 are intercrossed, f2 males and females are black, brown, gray, or tan.cross 3: silver females from a lineage where all females are silver and all males are gray are crossed with brown males from a lineage of all brown dogs. f1 males and females are all gray. when f1 are intercrossed, f2 males are black, brown, gray, or tan, f2 females are cream, gray, silver, or tan.select the correct statements regarding the mode of inheritance of the coat color genes.a) both genes are x-linked.b) both genes are autosomal.c) one of the genes modifies the expression of the other gene.d) each gene has an additive effect on the intensity of coat color.e) each gene independently specifies three colors.f) one of the genes is autosomal, and the other is x-linked.

Jason adds the antibiotic penicillin to a bacterial culture. the bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. what caused this genetic modification?

Which is not a type of symmetry? a. asymmetryb. radial symmetryc. bilateral symmetryd. lateral symmetry