Question

1. which of the following nucleotide base sequences complements the section of dna modeled above?

a utcgca
b ttagcg
c gcgatt
d ttucgc

1. which of these best explains how mutation can be beneficial to an organism?

a phenotypic change may create an advantage over other organisms.
b recombined genetic material improves genotype stability.
c mitosis becomes a favored means of reproduction.
d deoxyribose sugars develop into additional nucleotides.

1. coat color in mice varies greatly, ranging from black to grizzly gray, black - and - white, spotted, or white. the nucleus from a body cell of a grizzly - gray mouse is fused with an egg from a black mouse from which the nucleus has been removed. the egg begins to divide and is then transplanted into a female white mouse. what will be the most likely coat color of the offspring?

a black
b black with white spots
c grizzly gray
d white

Explanation:

1. In DNA, adenine (A) pairs with thymine (T) and cytosine (C) pairs with guanine (G). Analyze each option to find the complementary sequence.
2. Mutations can lead to new phenotypes. If a new phenotype gives an organism a survival or reproductive advantage, it is beneficial.
3. The nucleus of the cell contains the genetic information for coat - color. Since the nucleus is from a grizzly - gray mouse, the offspring is most likely to have the coat - color associated with the genetic material in that nucleus.

Answer:

1. C. GCGATT
2. A. Phenotypic change may create an advantage over other organisms.
3. C. Grizzly gray