Dichotomous or binary data:
a. nominal
b. ordinal
c. discrete
d. continuous
Ans: a. nominal
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The majority of Drosophila embryo segments will become part of the ________ in an adult fly.
A. abdomen B. thorax C. head D. head or thorax E. bithorax complex
Answer the following statements true (T) or false (F)
1. For the traits Mendel studied in pea plants, each trait, or phenotype, is expressed in only the dominant or recessive form, depending on the genotype. 2. In the ABO blood type system, there are six possible genotypes, but only two possible phenotypes. 3. Environmental conditions affect single-gene traits rarely, but affect polygenic traits often. 4. When the frequencies of all the phenotypes associated with a polygenic trait are plotted on a graph, they form a characteristic bell-shaped curve. 5. Gregor Mendel is sometimes referred to as the "father of genetics" because he influenced the science of genetics more than anyone else.
Which structure in males is shared by both the urinary and reproductive systems?
a. the prostate gland b. the ureter c. the urethra d. the urinary bladder
A hydrogen atom has one electron. How many covalent bonds can hydrogen form?
A) one B) two C) four D) none