In cats, the allele B produces black, while b produces yellow. Neither gene is dominant, and in the

heterozygous state, the phenotype is a combination of yellow and black spots called tortoiseshell. The
alleles B and b are X-linked. If a tortoiseshell cat has three tortoiseshell kittens and two black kittens,
give the genotype and phenotype of the tomcat that produced them, and give the sex of the kittens. What will be an ideal response?


BY black, tortoiseshell female, black males

Biology & Microbiology

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Directional selection favors

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Earth's largest carbon reservoir is ____

a. the atmosphere c. seawater b. sediments and rocks d. living organisms

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All of the following are common to both the Gram stain and the acid-fast stain EXCEPT

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Biology & Microbiology