Why is color blindness more common in males? What will be an ideal response?


ANSWER: Color blindness is an X-linked trait, which means the gene controlling color vision is on the
X chromosome. You will recall from earlier chapters that human females have two X
chromosomes while human males have only one. As a result, if the male receives the X
chromosome with the faulty allele, he will express the trait, but a female who receives one
faulty allele will not show the trait if her second X chromosome has the normal allele.

Biology & Microbiology

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The series of flattened sacs and associated vesicles in the cytoplasm of a cell is the ____________________

Fill in the blank(s) with correct word

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The majority of fossils are found in

a. sedimentary rock. b. Antarctica. c. peat bogs. d. tar pits. e. volcanic deposits.

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During the inflammatory response, dilation of blood vessels is caused by

A. both histamine and nitric oxide. B. cytokines. C. histamine. D. phagocytes. E. nitric oxide.

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An organism that lacks integration centers _____

A) cannot receive stimuli B) will not have a nervous system C) will not be able to interpret stimuli D) can be expected to lack myelinated neurons

Biology & Microbiology