Biology Ca-4 Review

What determines the code, or information, of a DNA molecule?

• the shape (structure) of the nitrogen bases
• the order (sequence) of the nitrogen bases
• the color of the nitrogen bases
• the frequency (number) of nitrogen bases

Gene Regulation refers to:

• genes "turned on and off"

• controlling the length of levis

• genes being deleted from the DNA strand

• picking the gens for your offspring

What goes in box 3

• Aabb

• AABB

• AAbb

• aaBb

Which of the following is the genotype for a purebreed dominant alleles?

• ggYy

• GGYy

• Ggyy

• GGYY

What components make up the backbone of DNA?

• Deoxyribose and Phosphate groups

• Phosphate groups and Pyrimidines

• Purines and Pyrimidines

• Purines and Nitrogen bases

Tags

112.34.c.6.A

Which portion of the structure of DNA is responsible for the coding of traits?

Tags

112.34.c.6.A

DNA strand 1 ATTCGGAAATTT

DNA strand 2

What sequence of nitrogen bases would be found on strand 2 of the DNA model above?

• ATTCGGAAATTT

• GCCTAAGGGCCC

• TAGCCTTAAA

• TAAGCCTTTAAA

Tags

112.34.c.6.A

DNA molecule segment is : TTACGCAAG The mutated DNA segment is TTCGCAAG. This is an example of ___ mutation.

• Substitution

• Deletion

• Insertion

• Inversion

The Himalayan rabbit's habitat has cold, snowy winters and mild summers. The body is typically covered in white fur except for the nose, feet, tail, and ears, which are covered in black fur.

A scientist shaved an area of white fur on the back of a Himalayan rabbit and placed an ice pack over the shaved area . The shaved area grew black fur.

Which of these best explains why the hair that grew back where the Ice pack was placed was black and not white?

• The white hair mutated to black hair as the rabbit's body temperature decreased.

• The coat color changed from white to black with the age of the rabbit.

• The genes for black hair were activated by specific temperatures.

• White hair only grows during certain times of the year.

The arctic fox inhabits northern area of North America. The same arctic fox is shown in the drawing during different times of the year.

What causes this change in the fur color?

• the genes for fur color change as the arctic fox grows older

• gene expression for fur color is regulated by magic

• the arctic fox has two traits for fur color that are determined at birth

• gene expression for fur color is regulated by temperature