Are genetic maps based on the actual distance on chromosomes as measured by nucleotides?
What will be an ideal response?
No. Genetic maps are based on the frequency of recombination between genes. As such, they show relative distances between genes but cannot specify actual distance in terms of nucleotides.
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Environmental variation can be used to describe why:
A. Identical twins have different weights. B. Leaves on a single tree turn color at different times in the fall. C. One tomato in a carton spoils before the rest. D. A litter of puppies has siblings of varying sizes. E. All of the above are correct.
The systems that coordinate communication are
A. skeletal and muscular. B. circulatory and respiratory. C. nervous and endocrine. D. digestive and circulatory. E. urinary and immune.
Suppose that your father is heterozygous for sickle cell disease. Suppose also that you know your mom has two "good" alleles. What is the probability that you will have the disorder and/or carry the "bad" allele and be able to pass it on to your children?
a. 25% for you, and 25% for your children b. 0% for you, and a possibility of passing it on to your children c. 0% for you, and you do not need to worry about passing the "bad" allele on to your children d. 50% for you, and 50% for your children
The bacteria-killing ______ is found in most epithelial tissue secretions.
A. amylase B. gastric juices C. lysozyme D. lactate E. DNAase