Individuals who are homozygous recessive for cystic fibrosis suffer from what defect?
1.inability to form Barr Bodies
2.altered hemoglobin molecules
3.altered membrane proteins
4.inability to convert phenylalanine to tyrosine
5.loss of chromosome tips
3
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The cancer drugs Gleevec and Herceptin bind to receptor ____________________ and stop the growth of cancer cells
Fill in the blank(s) with correct word
Which situation occurs after the creation of a new allele?
A) The gene pool becomes more diverse. B) The gene pool becomes less diverse. C) The gene pool fragments into smaller groups. D) Reproductive isolation always occurs in the group where the mutation occurred.
In a dividing fruit fly cell lacking components of the centralspindlin complex,
A) the nuclear envelope remains intact. B) the centrosome fails to duplicate. C) sister chromatids fail to separate for anaphase A. D) no anaphase B occurs. E) cytokinesis begins, but the cleavage furrow regresses.
Over time, the same bones in different vertebrates were put to different uses. This falls under the category of
A. heterologous structures. B. analogous structures. C. homologous structures. D. vestigial organs.