Genetic Practice

4. A person with Type A blood most likely has which genotype?

• I^AI^A only
• I^Ai only
• I^AI^B only
• ]I^AI^A or I^Ai

Tags

NGSS.HS-LS3-1

If two parents both have AB blood type, what is the chance they will have a child with only B blood type?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-3

Tay-Sachs disease is a recessive genetic disorder. If only one gene is present, an individual is a carrier. What is the probability of two healthy Tay-Sachs carriers having a child that has the disease 

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-3

Two heterozygous tall plants (Tt) are crossed. What are the expected genotypes and percentages of this cross?

• TT 50%; Tt 50% 
• TT 25%; tt 75%
• Tt 25%; TT 50%; tt 25% 
• TT 25%; Tt 50%; tt 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which best describes polygenic traits?

• traits that are always dominant to other traits
• traits that are always masked by any other traits
• traits that skip generations and appear in the offspring of later generations
• traits that are determined by a combined effect of more than one pair of genes

In snapdragon plants, red flowers are dominant to white flowers. When red-flowered plants are crossed with white-flowered plants, pink flowers are produced. If a researcher wants to produce plants with only white flowers, what color should the parent plants be?

• both red 
• both white 
• one red and one white 
• one white and one pink

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What type of inheritance would be classified if you saw Red flowers, Whites flowers and pink flowers come from the same parents?

• Complete
• Incomplete
• Co-Dominance
• Dihybrid

In a certain species of rabbits, black coat color is dominant over brown coat color. What is the probability of producing a rabbit with brown coat color from two rabbits that are both heterozygous for black coat color?

• 100%
• 50%
• 25%
• 10%

Tags

NGSS.HS-LS3-3

To determine the genotype of an unknown dominant phenotype (ex. Tall plant) you must perform a ____ and cross it with a _________ organism

• Test Cross ; Dominant
• Dominant ; Recessive ; Recessive
• Test Cross: Recessive

Alex has blue eyes, and both of his parents have brown eyes. What can most likely be concluded about Alex’s parents?

• His father has the recessive blue eye characteristic.
  
• His mother has the recessive blue eye characteristic.
  
• Both of his parents have recessive blue eye characteristics.
  
• Neither of his parents have the recessive blue eye characteristic.
  

Tags

NGSS.HS-LS3-1