Given a list of concordances (as percentages) for monozygotic and dizygotic twins for a selection of traits, describe how you would evaluate the relative input of environmental versus genetic factors for each trait
What will be an ideal response?
If the differences in concordances are high between MZ and DZ twins, this would suggest a higher genetic component because MZ twins share the genome. On the other hand, if there are no differences in concordances between MZ and DZ twins, this could indicate that environmental factors (either in utero or after birth) may contribute to these particular traits.
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The covalent bonds connecting monomer units in sugars can be formed by the removal of a water molecule. This reaction is referred to as:
A. a hydrolysis reaction. B. an oxidation-reduction reaction. C. a dehydration reaction. D. a hydration reaction.
The correct number of chromosomes is maintained during sexual reproduction by:
a. a process by which one half of the chromosomes in gametes are removed. b. chromosome doubling in the newly formed zygote. c. meiosis, which reduces the chromosome number by half. d. mitosis, which maintains the original chromosome number. e. replication of chromosomes twice during meiosis
________ are biological catalysts
Fill in the blank(s) with correct word
Nutrients that a cell needs to build new cells and make up a bulk of a cell's dry weight are called
A) micronutrients. B) small nutrients. C) essential nutrients. D) trace nutrients. E) tiny nutrients.