Mendelian Genetics

Passing on traits from parents to offspring

• Chromosome

• Genotype

• Heredity

• Allele

When one allele covers up the instruction

of the other allele in a homologous pair it is said to be the ____________________. (Symbolized by a capital letter.)

• Recessive Allele

• Dominant Allele

• Heredity

• Trait

The genetic cross between two parents for one trait:

Example BB x bb

B = dominant for brown

b = recessive for blue

• Incomplete Dominance

• Dihybrid Cross

• Monohybrid Cross

• Iron Cross

The Italian monk/scientist who first showed

the principles of genetics

• Watson and Crick

• Linnaeus

• Darwin

• Mendel

If a pea plant were homozygous recessive for height, how would its alleles be represented?

• TT
• Tt
• tt
• tT

A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance.  What percentage of the offspring will have pink (RW) flowers?

• 0%
• 25%
• 50%
• 100%

Snap dragon color is a incomplete dominant trait. A red flower (RR) is crossed with white flower (rr)? What color are flowers that are Rr?

• Red

• Green

• White

• Pink

Long hair is a dominant trait. Choose the BEST statement.

• This guinea pig definitely received two dominant traits. (HH)

• This guinea pig cannot have a recessive allele. (h)

• This guinea pig could be homozygous dominant (HH) or heterozygous (Hh)

• This guinea pig is homozygous recessive (hh)

This little guy has a recessive trait. Choose the best statement.

• Both parents gave him an "h". (hh)

• He has one "H" and one "h".

• He will die without hair.

• He is a baby and his hair will grow in a few more days.

There are many variations in skin color that can be inherited based on the combination of alleles that you inherit from your mom and dad.  This bell curve distribution is an example of

• incomplete dominance
• codominance
• multiple alleles
• polygenic inheritance