What features of meiosis allow for independent assortment of chromosomes?
A. Random alignment of homologous chromosome pairs on the metaphase plate
B. Separation of sister chromatids
C. Reduction of chromosome number from diploid to haploid
D. Both the separation of sister chromatids and the reduction of chromosome number from diploid to haploid
A. Random alignment of homologous chromosome pairs on the metaphase plate
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Genetic testing by ____ can be performed earliest in pregnancy
a. amniocentesis
b. obstetric sonography c. fetoscopy d. chorionic villus sampling e. preimplantation genetic diagnosis
In adaptive immunity, the ______ are the cells that poke holes in foreign cells.
Fill in the blank(s) with the appropriate word(s).
What large molecules are essential in determining the structure and function of cells and tissues?
a. RNA b. genes c. proteins d. hormones e. nucleotides
What biosafety levels do most introductory microbiology students work with?
BSL-2 All of the above levels BSL-3 BSL-1