In a series of experiments, genes that code for mutant forms of a receptor tyrosine kinase (rtk) are introduced into cells. the cells also can express their own normal form of the receptor from their normal gene, but the mutant genes are constructed so that the mutant rtk is expressed at considerably higher concentration than the normal rtk. what would be the consequences of introducing a mutant gene that codes for an rtk

a) lacking its extracellular domain?

b) lacking its intracellular domain?

What maintain homeostasis when a persons internal body temperature is 97.5°f

Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) has a single dorsal fin ® 5 (b) has a double dorsal fin ® 2 2. (a) one fin is spiny, the other is smooth ® 3 (b) one fin is not spiny or smooth ® 4 5. (a) has small fin on back near tail ® 6 (b) has no fin on back near tail ® 7 6. (a) has barbs near the mouth ® catfish (b) does not have barbs near the mouth ® 10 7. (a) tail is asymmetrical ® 8 (b) tail is symmetrical ® 9 10. (a) scales are small ® trout (b) scales are large ® whitefish what is the next step to complete to identify a fish that has a single dorsal fin, no fin on the back near the tail, and no barbs near the mouth? step 2 step 5 step 7 step 10

Genes that come together with different alleles are heterozygous. homozygous. genotype. segregated.