What pattern of inheritance is occurring if one person in a population has two different alleles of a particular gene and other people in the population have a third allele of this gene?
A) codominance
B) pleiotropy
C) incomplete dominance
D) multiple allelism
D
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Answer the following statements true (T) or false (F)
1. Cells can sense changes in the environment through alterations in the extracellular matrix. 2. Wrinkling observed with aging is due to increased production of the extracellular matrix molecule, collagen. 3. Blood vessels that can expand and contract contain a lot of collagen as a structural extracellular matrix protein. 4. Glycosaminoglycans and proteoglycans resist compression and are found in large abundance in joints of the body.
A DNA specimen that contains 30% guanine has ________ thymine.
A. 15%. B. 20%. C. 30%. D. 60%. E. The amount of thymine cannot be determined.
The atmosphere and seas of the early Earth lacked oxygen. What kind of organisms could NOT have lived under those conditions?
A. obligate aerobes B. obligate anaerobes C. facultative anaerobes D. chemoautotrophs E. cyanobacteria
Shawn's mother and Heather's mother are sisters. Shawn and Heather have ________ of their genes in common.
A) 1/2 B) 1/4 C) 1/8 D) 1/16