One of your friends has several brothers and sisters, each quite different in appearance, interests, and abilities, even though all have the same parents. Explain in detail how these siblings reflect crossing over and independent assortment.
What will be an ideal response?
Siblings may receive different genes from the same parents based upon crossing over. For example, if one parent is a red head and the other is brunette it is more likely that the majority of the siblings will be brunette. However given enough children, probability indicates that the red head phenotype will be expressed eventually.
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Describe the chemical composition of DNA
What will be an ideal response?
Protein synthesis on the primordial Earth may have been catalyzed by ____ before the evolution of enzymes
a. lightning b. RNA c. carbohydrates d. amino acids e. DNA
How many nucleotides make up a codon?
A) two B) three C) four D) five
The type of polio that involves the infection of the brain stem and medulla is
A) asymptomatic polio. B) postpolio syndrome. C) bulbar poliomyelitis. D) minor polio. E) nonparalytic polio.