Melanocytes use many enzymes to produce melanin. Based on their function, you would expect melanocytes in the skin to have a higher than usual number of
A) lysosomes.
B) chloroplasts.
C) ribosomes.
D) microtubules.
Answer: C
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Genes are said to be linked when:
A. they lie on the same chromosome. B. they lie on the same chromosome and are greater than 50 map units apart. C. they lie on the same chromosome and are less than 50 map units apart. D. they are alleles of the same gene. E. None of these choices are correct.
What type of thinking is required?
What will be an ideal response?
Which of the following pairs of structure are homologous?
_____ pectoral fin of a shark and front flipper of porpoise. _____ wing of a dragonfly and wing of a hawk. _____ wing of a bluejay and front flipper of a porpoise. _____ forelimb of a dog and forelimb of a horse. _____ wing of a dragonfly and forelimb of a flying squirrel.
Computer programs that search for ORFs tend to overestimate the number of functional genes in a genome
One method to validate that a potential gene is functional is to see if the same gene is present in two related species, such as mice and humans. A more stringent criterion is that the shared gene is present in a syntenic region of the chromosome. What is a syntenic region? What will be an ideal response?