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Both male and female cats can be orange or black because the gene that controls orange fur color is on the X chromosome. However, in males, an orange color is usually expressed in a striped or tabby pattern.
Female cats, on the other hand, can be tabby, calico or tortoiseshell. Calico and tortoiseshell are similar, but calicos have patches of white, orange and brown or black while torties’ coats are only orange and black.
Because the X chromosome is responsible for both orange and black fur, female cats can display both colors because they have two X chromosomes. But males, having only one X chromosome, can be either orange or black.
For a male cat to have a calico pattern, the feline has to have three sex chromosomes: two Xs and a Y.
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"Emerald Plaza’s hexagonal design allows for the maximum number of guestrooms and offices with views, as well as minimizes wasted space typical to rectangular buildings. Further more, this design utilizes angled window sills, which reflect ambient sunlight into the building, reducing lighting requirements. The Emerald Plaza was built in 1990 at a cost of $150 million. It consists of a steel frame structure with an exterior combination of granite stone panels and reflective glass set in a custom Kynar green aluminum window framing system. The structure itself is balanced on a 9-foot deep concrete block which acts like a floating device, allowing the building ebb and flow, mimicking the movement of water. This technique makes it one of the most stable structures in San Diego."
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