In dogs, shiny coats (S) is dominant over dull coats (s). If a shiny coat dog mates with a dull coat dog and some of the offspring are shiny and some are dull, what is the genotype of the shiny coat dog?

Ss

Explanation:

since some of the offspring carry a recessive allele, they must have received both recessive alleles from the parents to have a dull coat

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several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.