For a person who has any type of chromosomal abnormality, what factor(s) has/have the greatest impact on both physical and cognitive potential?
A. Prenatal testing and diagnosis
B. The number of affected family members
C. Personal family environment and social interaction
D. The number of chromosomes involved with the abnormality
C) personal family environment and social interaction
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A pea plant is known to be heterozygous and is described as YyWw. This is the plant's ________.
Fill in the blank(s) with the appropriate word(s).
Light rays are refracted (bent) when they cross the interface between materials with different refractive indices.
Answer the following statement true (T) or false (F)
This cellular structure lacks a membrane:
endoplasmic reticulum chloroplast nucleus nucleoid Golgi body
Which of the following provides some evidence that RNA probably evolved before DNA?
A. DNA polymerase has proofreading function. B. RNA polymerase makes a single-stranded molecule. C. RNA polymerase uses DNA as a template. D. RNA polymerase does not require localized unwinding of the DNA. E. DNA polymerase uses primer, usually made of RNA.