Heredity and Natural Selection

The evolutionary process by which advantageous traits that help an organism survive and reproduce become more common over time.

• natural selection

• adaptation

• mutation

• genetic engineering

Which organisms are most likely to survive?

• the best adapted
• the fastest
• the strongest
• the most domesticated (tamed)

Chromosomes are found in the ____________ of the cell

• Chloroplast
• Nucleus
• Cytoplasm
• Mitochondria

What is a gene?

• A chromosome

• A piece of clothing

• A sequence of DNA that codes for a protein

• A chemical messenger in your brain

What is a recessive trait?

• A trait that is always shown in the phenotype (uppercase letter)

• A trait that can be hidden (lowercase letter)

The physical traits of an organism are its

• Teletype

• Genotype

• Mesotype

• Phenotype

Genes always appear in pairs of alleles. Each parent donates ________ allele(s) for every trait.

• 1

• 2

• 23

• 46

____________________ are used to make predictions about the probability of genotypes and phenotypes of offspring.

• Dominant Squares

• Pedigrees

• Punnett Squares

• Recessive Squares

Bb is what genotype?

• Homozygous Dominant

• Heterozygous

• Recessive

• Alleles

Which of the following is homozygous dominant?

• Hh

• pp

• HH

• aa