Crossing-over occurs between
a) sister chromatids of the same chromosome
b) chromatids of nonhomologus chromosomes
c) non sister chromatids of a homologous pair
d) Both b and c are correct
Answer: c) non sister chromatids of a homologous pair
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Structural genes code for
A. cellular proteins. B. transfer RNA molecules. C. gene expression elements. D. ribosomal RNA molecules.
BRCA1 is a gene involved in repair of double-stranded DNA breaks. Mutant forms of this gene are linked to a substantial proportion of familial breast cancers
A woman who inherits a certain allele of the gene has about a 60-80% chance of getting breast cancer, as well as an elevated chance of getting ovarian cancer, in her lifetime. a. Why don't a higher percentage of women with the mutation get breast cancer? b. How would the breast cancer inheritance caused by BRCA1 be described in Mendelian terms?
Protozoan cysts are resistant to many disinfection methods
Indicate whether the statement is true or false
Emergent properties of living systems are properties that ________.
Fill in the blank(s) with the appropriate word(s).