The _________ on the chromosome is where the spindle fibers bind to the chromosome and is responsible for the shortening of spindle fibers during anaphase.
A. chromatin
B. centromere
C. tubulin
D. kinetochore
D. kinetochore
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Consider the following mtDNA sequences obtained from chimpanzee and humans in the following geographic regions: Chimp: ATGCGCATTCAATG China: ATGGGCTTTCAATC Ethiopia: ATGGGCATTCAATC England: ATGGGCTTTCAATC Kenya: ATGGGCATTCAATA
Which of the following statements is NOT correct: A. These data depict a higher level of sequence divergence between human and chimp than is to be expected based on overall levels of genetic similarity between human and chimp. B. These data are consistent with the multiregional hypothesis for the origin of humans because the Asian and European sequences are more closely related to each other than either is to the African sequences. C. These data are consistent with an "out of Africa" hypothesis for the origin of humans because the Kenya and Ethiopian samples exhibit an ancestral character state at position 7. D. The African sequences represent older evolutionary lineages than the European sequences because they have one polymorphic site.
In the treatment of ADA deficiency and SCID, which cell type was targeted for gene therapy?
A. Fibroblasts B. Embryonic stem cells C. Hematopoietic stem cells D. Lymphocytes E. Neutrophils
A structure with stems and leaves that arises from an apical meristem is called a ____
a. vascular system b. protonema c. sporangium d. rhizome e. shoot system
Parental strains are always homozygous dominant for all genes or homozygous recessive for all genes
Indicate whether the statement is true or false