In all plants, the diploid (2n) phase produces:
A) spores. B) flowers.
C) roots. D) sperm and/or eggs.
Answer: A
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A trait with incomplete penetrance is one that:
A. is only expressed in homozygous recessive individuals. B. is only expressed in homozygous dominant individuals. C. is only expressed in some of the individuals that have the genotype for that trait. D. is expressed in only some offspring of affected individuals. E. can be expressed differently in different individuals that have the genotype for that trait.
A covalent bond is formed between an anion and a cation.
Answer the following statement true (T) or false (F)
Down syndrome can be caused by either trisomy 21 or a Robertsonian translocation
a. True b. False
What is the role of van der Waals interactions in biological molecules?
1. Van der Waals interactions are strong bonds that play a major structural role in holding proteins together.
2. Although they are weak bonds, van der Waals interactions involve the sharing of electrons.
3. Van der Waals interactions are important only in water.
4. Although they are weak bonds, van der Waals interactions help to reinforce the three-dimensional shapes of large molecules.
5. Van der Waals interactions are too weak to be significant.