In genetic engineering A:scientists add or change the genes on a chromosome. B:natural selection is used to determine which traits to keep or eliminate. C:dominant and recessive genes are mixed together randomly. D:mitosis divides a cell into two equal parts.

In general, did the simulated mice align with your predictions from the punnett squares? yes or no?

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Color blindedness is a sex-linked trait. if we could see the pedigree chart for several more generations of the family illustrated here, we would expect a) more males to be color blind. eliminate b) more females to be color blind. c) no females to ever be color blind. d) an equal number of males and females that are color blind.