Biology

Biology, 27.06.2019 01:30, sdoty7702

Is a human hereditary disease that is caused by a dominant allele but does not show up in affected individuals until they are in middle age. a. cystic fibrosis b. sickle cell anemia c. tay-sachs disease d. huntington's disease e. hemophilia

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Biology, 27.06.2019 01:30, brianogle4069

Huntington's disease is caused by an autosomal dominant allele. it is a lethal disease, but it persists in the human population. which of the following statements best describes why? a. huntington's disease is sex-linked and every human has at least one ; chromosome; thus, the chances are extremely high for this allele to be maintained in the human population. b. huntington's disease presents symptoms that resemble cases reflecting a lack of dominance in some individuals; in those cases, the allele is passed on to the offspring. c. while lethal to a parent, huntington's disease will not be lethal to the offspring since it can skip a generation. d. huntington's disease presents symptoms in humans after many have already reproduced; therefore, they are unaware that they passed on huntington's disease. e. huntington's disease can be treated in humans that are heterozygous for the condition, but individuals who are homozygous cannot receive treatments; thus, they pass on the alleles to their offspring.

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Biology, 06.09.2019 21:30, sportygirlscand

Which statement most accurately describes the pattern of inheritance for a human disease caused by a dominant allele on the x chromosome (assuming the disease allele is rare)? a. affected mothers have all affected sons, but no affected daughters. b. only females inherit the disease. c. affected fathers have all affected daughters, but no affected sons. d. only males inherit the disease.

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Biology, 19.10.2019 03:30, kalcius9698

Suppose you examined a pedigree of a large family, going back 6 generations. in generation 5, a woman ("g5w") has a serious genetic disease--its first incidence in the family. in the next generation, three of her offspring--two boys and one girl--are affected, with one daughter unaffected. what is the most likely explanation? (a) g5w's parent--the one who married into the family--carried the disease allele (but wasn't affected), and it is autosomal dominant. (b) a mutation in one of the g5w's parents, during gamete formation, created an x-linked dominant disease allele. (c) a mutation in g5w created an autosomal dominant disease allele. (d) the disease allele is recessive and x-linked; g5w's spouse also has the allele.

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