A cross between two individuals who differ with respect to two gene pairs is a
____________________ cross. Fill in the blank(s) with the appropriate word(s).
ANS: dihybrid
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Potential energy is the energy of which of the following?
a. position b. motion c. chemical bonds d. light
All of the following are adaptations against excessive water and salt exchange between animals and their surrounding environment except:
a. having very permeable tissues. b. covering body with mucus. c. living inside a tube that can be isolated from the external environment. d. covering the body with a hard exoskeleton. e. actively absorbing salt ions with gills.
One difference between a gene mutation and a chromosomal mutation is that
a. A gene mutation affects the DNA of more genes than a chromosomal mutation b. A gene mutation can involve a insertion or deletion, but cannot result in a frameshift c. A chromosomal mutation can change the number of chromosomes in a cell d. A chromosomal mutation is more likely to be passed on to offspring or daughter cells
When the levels of estrogen in the blood are low, estrogen acts as a _______ regulator.
Fill in the blank(s) with correct word