QUIZ 4-3

Gregor Mendel is the father of genetics and he came up with a law that states organisms inherit two copies of each gene and donate one copy to each of their offspring.    This is known as the 

• law of segregation
• law of genetic linkage
• law of inheritance
• law of independent assortment

What is a phenotype?

• The expression of a trait; what you see.
• refers to the genetic makeup of an individual
• An organism that has the same genes for a trait (ex. TT or tt)
• the passing of traits from parent to offspring

What does heterozygous mean?

• An organism that has the same genes for a trait (TT or tt)
• An organism that has different genes for a trait (Tt)
• When neither gene is fully dominant; offspring is a mixture of both
• the different forms of a trait (hair color--> brown, blonde, red

An allele whose trait only shows up when no dominant allele is present.

• hidden allele
• dominant allele
• recessive allele
• present allele

having two of the same genes for the trait (sometimes called purebred).

• homozygous
• hetrozygous
• protein
• chromosome

T = tall an t = short
TT and Tt would result in  the following phenotype (you have to draw a punnett square)

• short
• tall
• both tall and short
• neither tall or short

G = green, g = yellow
The genotype for a yellow plant is...

• GG
• Gg
• gg
• all of the choices result in yellow

B=brown eyes
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.

• they have same phenotype and genotype
• they have different genotypes and phenotypes
• they have same phenotype but different genotypes
• they have same genotype but different phenotypes

one set of instructions for an inherited trait

• heredity
• allele
• trait
• gene

Which of the following alleles is homozygous recessive?

• Tt
• tt
• TT
• T