Bio Quarter 3 exam

Incomplete dominance is shown in certain flowers the yellow flower allele is (y) and the red flower allele is (r). What would the heterozygous individual look like?

• red

• yellow

• orange

• pink

Answer explanation

The blending of the red and yellow produces orange flowers demonstrating incomplete dominance.

In cows Roan Color is an example of a codominant trait the cross between Red and White cows. If we cross 2 roan cows what ratio should we expect for red cows?

• 1/4

• 2/4

• 3/4

• 0/4

• 4/4

A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?

• 25%
• 50%
• 75%
• 100%

What does heterozygous mean?

• An organism that has the same alleles for a trait (TT or tt)

• An organism that has different alleles for a trait (Tt)

• When neither gene is fully dominant; offspring is a mixture of both

• the different forms of a trait (hair color--> brown, blonde, red

If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?

• 100% Tt
• 50% Tt, 50% tt
• 75%Tt, 25%tt
• 25%TT, 50%Tt, 25%tt

This is an example of what?

• Complete dominance
• Incomplete dominance
• Codominance
• None of the above

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

• 0 %
• 25%
• 50%
• 75%

Which process and type of resulting cells are represented?

• mitosis, gametes
• mitosis, body cells
• meiosis, gametes
• meiosis, body cells

Which of the following cell types is formed by meiosis?

• muscle cells
• skin cells
• sperm cells
• blood cells

Which best describes the process shown?

• mutation in which the DNA content of the gene is ltered
• segregation of sister chromatids
• condensation and segregation of the alleles
• crossing-over which alleles are exchanged