Biology Answers

T= Tris

A= Glacial acetic acid

E= EDTA

B= Boric Acid

10x TAE Recipe

For 1L of 10x solution,

• 48.5 g tris

• 11.4 mL glacial acetic acid

• 20 mL 0.5M EDTA (pH 8.0)

TBE Buffer 10x Stock Recipe

• 108 g tris base

• 55 g boric acid

• 900 ml double-distilled H2O

• 40 ml 0.5 M EDTA solution (pH 8.0)

Adjust volume to 1 L find molarity

1.   For each statement below, tell whether the example is co-dominance or incomplete dominance.

a.   Birds can be blue, white, or white with blue-tipped feathers.

b.   Flowers can be white, pink, or red.

c.   A Ho can have curly hair, spiked hair, or a mix of both curly and spiked.

d.   A Sneech can be tall, medium, or short.

1.   Most sex-linked, recessive traits–including hemophilia and color blindness–appear more frequently in males. This phenomenon is best explained by which statement?

a.   Males have an X chromosome with dominant genes.

b.   Most of the genes on the X and Y chromosomes of males are recessive.

c.   In males, the recessive sex-linked genes appear only on the Y chromosome.

d.   In males, the Y chromosome lacks the genes needed to mask the recessive genes on the X chromosome.