With few exceptions, we can't use observable traits to measure genetic variation in populations because:
A. observable traits don't vary enough among
individuals to measure.
B. we can't identify enough observable traits
to be useful, even if they could be measured.
C. many traits are encoded by large numbers
of genes.
D. observable traits are products of the
environment as well as the genome.
E. Many traits are encoded by large numbers
of genes, and observable traits are products
of the environment as well as the genome.
E
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Extra fluid that leaks out of the capillary bed
enters
a. the surrounding cells. b. the lymphatic system. c. the venules. d. the capillary again. e. the adjoining arterioles
In control of the lactose operon, allolactose acts as a(n)
1.repressor. 2.activator. 3.co-repressor. 4.inducer. 5.structural gene.
In Labrador retrievers, coat color is governed by two different genes-TYRP1 controls the amount of brown pigment, while MC1R alleles control the color. This type of inheritance is called____.
A. multigenic inheritance B. codominance C. incomplete dominance D. epistasis E. pleiotropy
True or False: Nervous system diseases must always use the respiratory tract as a portal of entry because of its proximity to the brain.
What will be an ideal response?