Genetics And Punnett Squares Quiz (4)

10 Questions | By Raleighegypt

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Its about Punnett squares and DNA genetic genes. How DNA works and a easier way to determine the percentage of genes.

Questions and Answers

1.

A heterozygous tall (Tt) plant is crossed at with a short plant (tt). The probability that offspring plants will be tall is...

Discuss
- A.
  
  25%
- B.
  
  50%
- C.
  
  75%
- D.
  
  100%
2.

Organisms that have two different alleles for a particular trait are said to be...
- A.
  
  Hybird
- B.
  
  Homozygyous
- C.
  
  Heterozygous
- D.
  
  Dominant
3.

A cross of a black chicken (BB) with a white chicken (WW) produce all speckled offspring (BW). This type of inheritance is known as ..
- A.
4.

According to the dihybrid cross below, what proportion of peas would be green and smooth?

Discuss
- A.
  
  9/16
- B.
  
  1/4
- C.
  
  3/8
- D.
  
  1/16
5.

What is the probability that a hamster will have black, fine hair?
- A.
  
  2/16 (1/8)
- B.
  
  4/16 (1/4)
- C.
  
  1/16
- D.
  
  8/16 (1/2)
6.

When a plant breeder crossed two red roses, 78% of the offspring had red flowers and 22% had white flowers. According to these results, the allele for red flowers is most likely:

Discuss
- A.
  
  Recessive
- B.
  
  Sex-linked
- C.
  
  Dominant
- D.
  
  Codominant
7.

Tracey has three brothers. One of Tracey's brothers has sickle-cell anemia, a disease caused by a recessive allele. She, her parents, and the other children do not have it. If Tracey's parents have another child, what is the chance that the child will have sickle-cell anemia?

Discuss
- A.
8.

In pepper plants, the allele for hot flavor (H) is dominant to the allele for mild flavor(h). A farmer crosses a homozygous dominant plant with a recessive (mild) plant. What percentage of the offspring from this cross will have hot flavor?

Discuss
- A.
  
  25%
- B.
  
  50%
- C.
  
  75%
- D.
  
  100%
9.

Which four items are living things with D.N.A.?
- A.
  
  Water, tree, birds, soil
- B.
  
  Animals, people, plants, bacteria
- C.
  
  Desk, clouds, hair, yeast
- D.
  
  Cells, bacteria, metal, fertilizer
10.

What are the four main bases of D.N.A.?
- A.
  
  Alleles, bacteria, D.N.A., sunlight
- B.
  
  Adenine, guanine, cytosine, thymine
- C.
  
  Oil, chinchilla, albino, cement
- D.
  
  Bristles, onions, grease, tar

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