Unit 2 Summer exam: Ch 3, 4, 7 & 8

How many chromosomes do you get from each parent?

• 22
• 23
• 44
• 46

The struggle for existence against other members of an organism's species is

• Competition

• Heterozygous

• Mutation

• Genotype

When the DNA of an organism is altered it is referred to as…

• Mutation

• Biotechnology

• Dominant

• Homozygous

B=Brown eyes b=Blue eyes

If a person was Bb they would have

• Blue eyes

• Brown eyes

Bobby has curly dark hair, blue eyes, a small mouth, and plays the drums. What is his non-inherited/acquired characteristic?

• curly hair

• blue eyes

• small mouth

• plays the drums

What causes mutations?

• environmental factors

• phenotypes

• chromosomes

• nucleus

Another name for sex cells or reproductive cells is 

• genes
• alleles
• gametes
• phenotype

If you are a boy, what percent of your genes did you get from your dad?

• 25%
• 50%
• 75%
• 100%

What is one advantage of sexual reproduction?

• offspring are identical to parents

• offspring are resistant to viruses

• offspring have less variety

• offspring inherit a wider variety of genetic information

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes