Failure of the homologous chromosomes or sister chromatids to separate during either mitosis or meiosis; produces cells with abnormal chromosome numbers.
What will be an ideal response?
Nondisjunction
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In pea plants, flowers are either white or purple; the purple color is produced by pigments called anthocyanins. The production of anthocyanins is a two-step process; the first is controlled by the C gene and the second by the P gene
Both genes must produce functional proteins for anthocyanin to be produced. For each gene, the dominant (C and P) alleles produce functional proteins. You cross two pea plants, each with the genotype CcPp. What proportion of their offspring will have white flowers? A. 13/16 B. 9/16 C. 7/16 D. 3/4 E. 1/4
Which of the following is false about animals?
a. they are multicellular. b. they are heterotrophic. c. they are autotrophs. d. they lack cell walls. e. most can actively move.
The chemical formula of the oxygen we require is O2. It is
A) a compound. B) an isotope. C) an element. D) a molecule. E) both an element and a molecule.
Which transcription factors are normally bound to the Psf promoter in the presence of Mg2+ only?
(a) none (b) MetA only (c) MetA and Met B (d) MetA, MetB, and MetC