In what sense is genetics the key to all of biology?
What will be an ideal response?
Genes control what cells look like and what they do as well as how babies develop and how we reproduce. An understanding of what genes are, how they are passed from generation to generation, and how they work is essential to our understanding of all life on Earth, including our species, Homo sapiens.
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In any experiment, changes to the dependent variable based on the manipulations of the independent variable are
measured. When determining the action spectrum of a given plant, what is the independent variable and what is the dependent variable?
a. independent = absorption of light; dependent = wavelength b. independent = wavelength; dependent = absorption of light c. independent = rate of O2 release in photosynthesis; dependent = absorption of light d. independent = wavelength; dependent = rate of O2 release in photosynthesis e. independent = rate of O2 release in photosynthesis; dependent = wavelength
The mother of these progeny resulted from a cross between two flies from true-breeding lines. What are the genotypes of these two lines?
In Drosophila, the autosomal recessive pr and cn mutations cause brown and bright-red eyes, respectively (wild-type flies have brick-red eyes). Flies who are homozygous recessive at both pr and cn have orange eyes. A female who has wild-type eyes is crossed to an orange-eyed male. Their progeny have the following distribution of eye colors:
A) pr cn+ / pr cn+ and pr+cn / pr+cn
B) pr+cn+ / pr+cn+ and pr cn / pr cn
C) pr+cn+ / pr cn and pr cn / pr cn
D) pr+cn / pr cn and pr cn+ / pr cn
E) More than one of these could be true.
Killifish and pike-cichlids raised in natural
conditions will a. affect the age at first reproduction of the guppies that live with them. b. prey on guppies. c. affect the growth rate of guppies. d. affect the evolution of the guppies’ life history traits. e. do all of these.
A pericentric inversion includes the centromere
Indicate whether the statement is true or false