Q: Two phenotypically unaffected parents produce two children with familial Down syndrome.
Two phenotypically unaffected parents produce two children with familial Down syndrome. With regard to chromosomes 14 and 21, what are the chromosomal compositions of the parents?
See AnswerQ: Explain why small deletions and duplications are less likely to have a
Explain why small deletions and duplications are less likely to have a detrimental effect on an individual’s phenotype than large ones. If a small deletion within a single chromosome happens to have a...
See AnswerQ: Aneuploidy is typically detrimental, whereas polyploidy is sometimes beneficial, particularly
Aneuploidy is typically detrimental, whereas polyploidy is sometimes beneficial, particularly in plants. Discuss why you think this is the case.
See AnswerQ: Explain how aneuploidy, deletions, and duplications cause genetic imbalances.
Explain how aneuploidy, deletions, and duplications cause genetic imbalances. Why do you think that deletions and monosomies are more detrimental than duplications and trisomies?
See AnswerQ: Female fruit flies homozygous for the X-linked white-eye
Female fruit flies homozygous for the X-linked white-eye allele are crossed to males with red eyes. On very rare occasions, an offspring of such a cross is a male with red eyes. Assuming these rare of...
See AnswerQ: According to the theory of evolution, why have these changes occurred
According to the theory of evolution, why have these changes occurred in horse populations over the course of many generations? From Figure 1.11:
See AnswerQ: A cytogeneticist has collected tissue samples from members of a certain butterfly
A cytogeneticist has collected tissue samples from members of a certain butterfly species. Some of the butterflies were located in Canada, and others were found in Mexico. Through karyotyping, the cyt...
See AnswerQ: Why do you think that humans with trisomy chromosome 13, 18
Why do you think that humans with trisomy chromosome 13, 18, or 21 can survive but other trisomies are lethal? Even though X chromosomes are large, aneuploidy of this chromosome is also tolerated. Exp...
See AnswerQ: A zookeeper has collected a male and a female lizard that look
A zookeeper has collected a male and a female lizard that look like they belong to the same species. They mate with each other and produce phenotypically normal offspring. However, the offspring are s...
See AnswerQ: What is endopolyploidy? What is its biological significance?
What is endopolyploidy? What is its biological significance?
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