Space and Genetics Review

A segment of DNA that codes for a trait

• gene

• centromere

• chromosome

• chromatid

A version or variation of a gene

• trait

• gene

• allele

• DNA

The alleles that an organism has/inherits are its

• genotype

• phenotype

• chromosome

• recessive

The observable expression of a trait is its

• phenotype

• genotype

• chromosome

• allele

Hair color and eye color are examples of a person's....

• recessive traits

• dominant alleles

• genotype

• phenotype

What is the definition of Phenotype?

• The diagram that shows all the chromosomes of an individual

• The combination of alleles that control that an individual has for a particular trait

• How many genes on one chromosome

• How a trait is expressed (what it looks like or what it does)

Genes always appear in pairs. Your parents donate ________ allele for every trait.

• 1
• 2
• 23
• 46

A capital P represents a dominant allele for purple flower. A lowercase p represents the recessive allele for white flower. Which is the only way to get a white flower color?

• Pp

• PP

• pP

• pp

Heterozygous or homozygous?

BB

• heterozygous

• homozygous

A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks? (a)  

• 0%
• 25%
• 50%
• 75%