In a certain breed of dog, the alleles b and b determine black and brown coats respectively. however, the allele q of a gene on a separate chromosome is epistatic to the b and b color alleles resulting in a gray coat (q has no effect on color). if two animals of genotype b/b q/q are crossed, what phenotypic ratio is expected in the progeny?

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation: