True or False: The two most common causes of laboratory accidents are ignorance and carelessness
a. TRUE
b. FALSE
Answer: A
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The two-factor crosses performed by Mendel support the observation that
A. alleles for a given trait are distributed randomly among an individual's gametes independent of the alleles for other traits. B. traits that are encoded by genes on different chromosomes are never found within the same gamete. C. the F1 generation can display phenotypes in combinations different from those seen in the P generation. D. the F2 generation will only display phenotypes in the same combinations as the P generation. E. self-fertilization of the F1 generation will produce 100% heterozygous plants at both loci.
The zona pellucida is
A) a protective layer around the secondary oocyte. B) a protective layer around the sperm. C) a bump on the head of a sperm that contains enzymes. D) the biggest constriction of a chromosome.
A base at the first position of an anticodon on the tRNA would pair with a base at the ________ position of the mRNA
Fill in the blank(s) with correct word
Nucleolus , chromatin are the structures seen in the
a. cytoplasm b. chloroplast c. nucleus