To see how many atoms are in the chemical formula or element symbol, look at the subscript. Example: Hz
There are two Hydrogens.
H2O
There is one Oxygen. No subscript means one.
Directions: Find the number of atoms in each chemical formula.
1. NaCl (sodium chloride or table salt)
Na-
CI-

2. CO2 (carbon dioxide)
C-
0-

3. O2 (oxygen)
0-

4. CoH1206 (glucose)
C-
H-
0-

To see how many atoms are in the chemical formula or element symbol, look at the subscript.

When there's a COEFFICIENT, multiply the coefficient by each subscript.
Example: 2H2O1
20102

Directions: Find the number of atoms in each chemical formula.

5. 2NaCl (sodium chloride or table salt)
Na
CH-

6.3C02 (carbon dioxide)
C.
0-

7.402 (oxygen)
0-

8. 2C6H12O6 (glucose)
c
H-
0-

Round peas are dominant to wrinkled. what would you cross a round pea with to determine if it were heterozygous or homozygous dominant? why? ?

Approximately 90% of all cases of polycystic kidney disease are inherited in an autosomal dominant fashion. the disease is typically related to mutations to genes (pkd1 and pkd2). pkd genes can be found on chromosome 16. the disease occurs in approximately 1: 800 to 1: 1000 people. here is a hypothetical example. the dominant allele d will cause the development of pkd. the recessive allele is known as d. what genotypes would correspond to suffering from pkd? dd, dd what genotypes would correspond to being normal (not suffering from pkd)? dd consider that 1: 1,000 people have pkd in your population of 325million. consider that pkd is inherited in an autosomal dominant fashion. show you math for all of the following questions: what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is p? what is q? how many people in your population would have pkd?

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs