Unit 6 Heredity Platform Questions

______________________ enzymes cut DNA at specific nucleotide sequences.

• Oxidation
• Transport
• Restriction
• Hydrolysis

Which fragments travel the furthest (larger or smaller)?

• Larger
• Smaller

The DNA fingerprints produced by gel electrophoresis below show evidence from a crime scene. Which crime scene DNA can be eliminated as a suspect?

• 1
• 2
• 3
• 4

Roan cattle show codominance for the color of their hair. There are alleles for red hair and white hair. What would you expect a heterozygous roan bull to look like if the trait showed incomplete dominance instead?

• It would be white.
• It would be spotted.
• It would be pink.
• It would be red.

Two heterozygous purple-flowering pea plants are crossed. If purple is dominant over white, what are the expected phenotypic results?

• 75% purple, 25% white.
• 100% purple.
• 50% purple, 50% white.
• 25% purple, 75% white.
• 100% Pp

Selective breeding produces

• more offspring
• less offspring
• desired traits in offspring
• transgenic offspring

The principles of probability can be used to

• predict the traits of the offspring of genetic crosses.
• determine the actual outcomes of genetic crosses.
• determine which species should be used in genetic crosses.
• decide which organisms are best to use in genetic crosses.

The process of intentionally making changes in the DNA code of a living organism in a lab is called

• hybridization.
• genetic engineering.
• selective breeding.
• inbreeding

Time to think! A parent (P) generation of plants is crossed. One parent is a tall plant (TT) and is crossed with a short plant (tt), which produces the F1 generation. If the tall F1 pea plants are allowed to self-pollinate & reproduce, what phenotypes will be shown by their offspring?

• all of the offspring will be tall.
• all of the offspring will be short.
• the offspring can be tall or short.
• the offspring will be of medium height.

A heterozygous tall pea plant is crossed with a short plant. The probability that an offspring plant will be tall is

• 25%
• 100%
• 75%
• 50%