1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
alexira [117]
3 years ago
15

Red-flowering snapdragons are homozygous for allele R1. White-flowering snapdragons are homozygous for allele R2. Heterozygous p

lants (R1R2) bear pink flowers. What phenotypes should appear among F1 offspring of the crosses listed below? What are the expected probabilities for each phenotype?
Biology
1 answer:
lana [24]3 years ago
8 0

Answer:

a) 1/2 red, 1/2 pink; b) all pink; c) 1/4 red, 1/2 pink, 1/4 white; d) 1/2 white, 1/2 pink

Explanation:

The flower color trait in snapdragons shows incomplete dominance: the heterozygous genotype produces an intermediate phenotype between the two different homozygous genoytpes.

<u>The possible genotypes and phenotypes are:</u>

  • R1R1 : red
  • R1R2: pink
  • R2R2: white

<h3>a. R1R1 X R1R2 </h3>

The R1R1 individual only produces R1 gametes. The R1R2 parent produces 1/2 R1 gametes and 1/2 R2 gametes.

<u>For that reason, the F1 will be:</u>

  • 1/2 R1R1 (red)
  • 1/2 R1R2 (pink)

<h3>b. R1R1 X R2R2 </h3>

The R1R1 individual only produces R1 gametes. The R2R2 parent only produces R2 gametes.

<u>For that reason, the F1 will be</u> :

  • 100% R1R2 (pink)

<h3>c. R1R2 X R1R2 </h3>

Both parents are heterozygous. This is a monohybrid cross, and from Mendel's Laws <u>we expect the following offspring:</u>

  • 1/4 R1R1 (red)
  • 2/4 R1R2 (pink)
  • 1/4 R2R2 (white)
<h3 /><h3>d. R1R2 X R2R2</h3>

The R1R2 parent produces 1/2 R1 gametes and 1/2 R2 gametes. The R2R2 individual only produces R2 gametes.

<u>For that reason, the F1 will be:</u>

  • 1/2 R2R2 (white)
  • 1/2 R1R2 (pink)
You might be interested in
How do genetics (genetic predisposition) and the environment work together to cause substance abuse in individuals? What is the
vampirchik [111]

Answer: The drug abuse is influenced by the environment and exerts influence on the gene expressions.

Explanation:

The genetic make up of the person is decides, which genes will be expressed and develop a trait in an individual. But this genetic expression can be influenced by the environmental factors like food, exposure to sunlight, and others. This study which relate environment with the genetic make up is called epigenetics. No person is drug addict by birth but the consumption of drug can influence the genetic make up and traits in a abuser. So here, the environment is influencing the genetic basis of a abuser.

6 0
3 years ago
What did Charles Darwin discover as a result of his experiments with breeding pigeons?
Veronika [31]
Charles Darwin noticed that among the same species there were variations in traits based upon geographical location. These changes may have evolved from climate differences, predator/prey relationships and food sources. This particular experiment was intended to duplicate natural selection by demonstrating the concepts with artificial selection. The result was that over time, new traits could be bred for. Although there may be more than one correct answer here, the best answer is the first; desirable traits can be selected and bred in offspring.
4 0
3 years ago
Match the elements to the type of cycle that they possess Carbon Sulfur Oxygen Nitrogen Phosphorus Sedimentary Cycle or Gaseous
Aleks04 [339]

Answer:

Sulfur, phosphorous.... sedimentary cycle.

Carbon, oxygen and nitrogen.... gaseous cycle

4 0
3 years ago
The wolf's scientific name is Canis lupus. What does Canis represent in its
GrogVix [38]

Answer:

Canis represents the genus   :D

3 0
3 years ago
23.
Burka [1]

Answer:

D

incomplete dominance

Explanation:

since and intermediary phenotype appears in the heterozygous form

6 0
2 years ago
Read 2 more answers
Other questions:
  • oxygen is needed to produce energy in eukaryotic cells. which organelle would you think needs oxygen the mst
    14·1 answer
  • A physician who analyzes cells tissues and organs to diagnose disease is called a
    10·1 answer
  • A single hydra can produce offspring by growing a new individual from any portion of its body. What is the reproduction method o
    5·2 answers
  • Find three elements whose symbols are like states
    10·1 answer
  • Describe the arrangement of the water molecule to molecule with one <br> another
    12·1 answer
  • What would happen if someone was not able to produce enough amylase?
    9·1 answer
  • The process of a change in species over long periods of time are called
    13·1 answer
  • Each of the following is a function of the integumentary system except:
    6·1 answer
  • 5.1 The table below showed places where potential hazards may occur. Write the possible hazards for the given places.
    15·1 answer
  • Herceptin,a drug developed by the biotechnology industry, is used to treat breast cancer. it is taken only after a patient under
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!