Describe how natural selection might operate to change the genetic makeup of a population of rabbits if a new, faster predator was introduced into their habitat.
What will be an ideal response?
Populations have natural variation in their frequency of various alleles. Interactions with the environment or other organisms may favor (or conversely, be detrimental to) individuals with certain genetic makeup. Those individuals may then show enhanced (or reduced) survival and/or reproduction. With the next generation, the offspring of that parental generation will likely carry more of those “favored” traits, and so on through generations, resulting in a gradual change in the genetic makeup of the population. When “faster” predators are introduced, the rabbit population will decrease at first until natural selection favors faster rabbits and the cycle begins anew.
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Define the term hemizygous and explain how the hemizygous condition relates to sex-linked inheritance
What will be an ideal response?
The single-factor crosses performed by Mendel support the observation that
A. the two alleles for a given gene are distributed randomly among an individual's gametes. B. the two alleles for a given gene are found within the same gamete. C. if the recessive alleles for two different genes are on the same chromosome, they will never be found within the same gamete. D. only the dominant alleles for a given trait are found in an organism's gametes. E. if the dominant alleles for two different genes are on different chromosomes, they will never be found within the same gamete.
________ lakes are nutrient-rich and tend to have large populations of algae.
A. Eutrophic B. Temperate C. Stratified D. Oligotrophic
The ________ are the 22 pairs of chromosomes not including the X and Y chromosomes
Fill in the blank(s) with correct word