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
kramer
3 years ago
10

Gene S controls the sharpness of spines in a type of cactus. Cactuses with the dominant allele, S, have sharp spines, whereas ho

mozygous recessive ss cactuses have dull spines. At the same time, a second gene, N, determines whether or not cactuses have spines. Homozygous recessive nn cactuses have no spines at all. If doubly heterozygous SsNn cactuses were allowed to self-pollinate, the F2 would segregate in which of the following ratios?
Biology
1 answer:
PSYCHO15rus [73]3 years ago
8 0

Answer and Explanation:

<u>Available data</u>:

  • S allele expresses sharp spines, and it is dominant
  • s allele expresses dull spines, and it is recessive
  • N allele expresses the presence of spines, and it is dominant
  • n allele expresses the absence of the spines, and it is recessive

<u>Cross:</u> Doubly heterozygous SsNn individuals allowed to self-pollinate

Parental)   SsNn     x     SsNn

Gametes) SN   sN   Sn   sn   /   SN   sN   Sn   sn

Punnet square)     SN          Sn        sN        sn

                 SN       SSNN     SSNn    SsNN   SsNn

                 Sn        SSNn      SSnn    SsNn    Ssnn

                 sN        SsNN      SsNn    ssNN   ssNn

                 sn         SsNn      Ssnn     ssNn    ssnn

  • 9/16 individuals with sharped spines, S-N-

        Their genotypic ratios are 1/16 SSNN, 2/16 SSNn, 2/16 SsNN, 4/16    

        SsNn

  • 3/16 individuals with dull spines, ssN-

        Their genotypic ratios are 1/16 ssNN and 2/16 ssNn

  • 4/16 individuals with no spines at all, --nn

        Their genotypic ratios are 1/16 SSnn, 2/16 Ssnn, and 1/16 ssnn.    

You might be interested in
What would likely to happen if heavy pressure is applied when using a pumice stone on feet? ​
lubasha [3.4K]

Answer:

If you apply too much pressure, you can cause redness and abrasions.

8 0
3 years ago
Name a protein that carries vital materials throughout the body.<br><br><br><br> PLEASE HELP
Tema [17]

Answer:

<h2>I looked it up I'll help,Brainliest plz</h2><h2 />

Explanation:

NutritionProteins: building blocks of the body. Excluding water and fat, the human body is made up almost entirely of protein. Protein is the main component of muscles, bones, organs, skin, and nails. Excluding water, muscles are composed of about 80% protein, making this nutrient especially important for athletes.

6 0
3 years ago
Who uses the word animal science
Sedaia [141]

Answer:

scientists

Explanation:

7 0
3 years ago
Forensic Science Question
gladu [14]

Answer:

The statement is true

Explanation

the statement is wrong because the structure of DNA was discovered in 1953 by  James Watson and Francis Crick and they explained it very well. till 1985 everything about the structure of DNA was very well known and the scientist knew that the DNA of each person differs from each other.

8 0
3 years ago
Read 2 more answers
If hares moved faster and were thus harder for lynx to capture, which rate in the lotka-volterra predator-prey model would chang
harina [27]

If hares moved faster and were thus harder for lynx to capture, the rate in the lotka-volterra predator-prey model that would change is the searching efficiency.

Lotka-volterra predator-prey model is a prey-predator model is a first order non linear differential equation that describes about the dynamics of two biological systems where the species interacting will consist of a prey and a predator.

The population of the prey and predator effects the population of each other in various ways. Like when the population of prey will increase it will cause increase in population of predator as well while the inverse is true in case of predator population increase.

When the hares will move faster, lynx searching efficiency will reduce due to difficulty in finding the prey.

To learn more about lotka-volterra predator-prey model here

brainly.com/question/24188784

#SPJ4

3 0
2 years ago
Other questions:
  • Photolysis is a part of which cycle?
    12·1 answer
  • Question:
    12·1 answer
  • Label the water cycle diagram .
    6·1 answer
  • What is the answer to this question
    8·1 answer
  • Before the experiments of Hershey and chance, some scientists thought traits were inherited through
    15·1 answer
  • What is 1.26 written as a fraction or mixed number? A. 1/26 B. 1 13/50 C. 1 2/6 D. 2 1/6
    15·1 answer
  • What is the probability that the couple would have
    14·1 answer
  • The carbon cycle involves a variety of processes that move and convert carbon between Earth systems. The diagram summarizes the
    9·1 answer
  • Which of the following is effective in reducing the number of viral infections?
    14·2 answers
  • True or False. As Finches move to a new island, random variation in the beaks/necks allowed
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!