Heredity Quiz

When Mendel worked with pea plants, he noticed that some traits like round seeds, seemed to hide other traits, like wrinkled seeds.  What do we call the trait that hides or masks another trait?

• Incomplete dominance
• A dominant trait
• A recessive trait
• DNA replication

Round face is dominant to oval face. The following genotype will result in which phenotype?
ff

• round 
• oval 
• square

A ________________________ is used to predict the possible genotype from certain parents

• Mendel Grid
• Genetic Tic Tac Toe
• Punnett Square
• Pedigree Plot

an organism with the same form of a trait is called a 

• hybrid
• purebred
• bread
• allele

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X ^R X ^r ?

• male with white eyes

• female with red eyes

• male with red eyes

• female with white eyes

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X ^R Y ?

• male with white eyes

• female with white eyes

• male with red eyes

• female with red eyes

Look at this cross: X^BX^b x X^BY

What proportion of the male children are colorblind?

• 100%

• 75%

• 50%

• 25%

Look at this cross: X^B X^B x X^b Y

What proportion/percent of the male children are colorblind?

• 100%

• 75%

• 25%

• 0%

Why is the gene for a disease or disorder more likely to be found on the X chromosome than Y?

• The X chromosome has many more genes
• The Y chromosome has many more genes

Males are more likely to suffer from a sex-linked disease or disorder because

• males are the weaker sex
• males have less DNA
• males have 1 X chromosome, so the disorder is more likely to be expressed