In cystic fibrosis, two unaffected carriers can have a child with the disease. It is as common in boys as in girls. This disease is
A. X-linked dominant.
B. autosomal recessive.
C. autosomal dominant.
D. X-linked recessive.
E. pleiotropic.
B. autosomal recessive.
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The study of algae is called
A) algaeology. B) botany. C) mycology. D) phycology.
The process by which a sperm cell combines with an egg cell is
A. fertilization. B. germination. C. mitosis. D. replication. E. recombination.
Four of the following are true about water molds. Which one is the exception?
a. Water mold is responsible for the Irish potato famine. b. Some species are aquatic parasites. c. Most act as decomposers. d. Their filaments are composed of haploid cells. e. They are heterotrophs.
Suppose a researcher claims to be able to make a hybrid animal that is a cross between a goat and a horse. This animal has been termed "gorse." The normal diploid number for a goat is 60, and the normal diploid number for a horse is 62. Ignore the ethics
here, and answer the following. Based on normal meiosis, a goat gamete (haploid) should have ________ chromosomes, whereas a horse gamete (haploid) should have ________ chromosomes. This means we would expect our hybrid gorse to contain a total of ________ chromosomes per cell. Let's assume our researcher beats the odds and that this hybrid "gorse" survives. Even if the hybrid survives, it is likely that it will be sterile. Referring to the above numbers, you can see that a problem is likely to occur when the hybrid produces its gametes. Explain what that problem will be. Fill in the blank(s) with correct word