Digital PSAT Reading and Writing Practice Question 124: Answer and Explanation
Question: 124
Nearly all tortoiseshell and calico cats are female. This is because the gene that dictates whether the cat's fur is orange or black is located on the X chromosome. Since male cats have XY chromosomes, they will usually only have one allele coding for either orange fur or black fur. Males would be calico or tortoiseshell if they had two X chromosomes along with a Y, ____________ this is very rare.
Which choice completes the text with the most logical transition?
- A. so
- B. if
- C. but
- D. moreover
Correct Answer: C
Explanation:
(C) This is the only option that provides a needed contrast between what could potentially cause males to be calico or tortoiseshell and the fact that such a possibility is quite rare.
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