Karyotypes can be studied to determine an organism’s chromosomal makeup and to detect genetic defects. down syndrome is a genetic disorder that is also called trisomy 21. what would trisomy 21 look like in a karyotype?
a. missing chromosome 21
b. extra chromosome 21
c. missing sex chromosome
d. extra sex chromosome

List two new traits (structural or behavioral) that each new species of rat might demonstrate as it adapts to the conditions on two of the four islands. choose only two islands that are described in the lesson. record the island latter and the major habitat feature of the island. then list two new traits each rat subspecies might demonstrate in order to survive the habitat on that island. note: new traits should be unique to that island and be in response to that island’s habitat feature. i cannot remember islands that were names in the lesson so only answer if you have done the lesson (5.13 life science 7b) choose 2 of the islands and describe a structural and a behavioral trait for a rat on each island so 4 total answers, 2 different structurals and 2 different behaviorals, one for each rat for each island

Dna replication or repair occurs in a cell in all of thw following situations except when

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?