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
VMariaS [17]
3 years ago
13

Skin color in a certain species of fish is inherited via a gene with four different alleles. Each allele confers a unit of color

darkness such that having allele S1 confers one unit of color, S2 has two units, S3 has three units, and S4 confers four units. A fish of this type has the genotype S1, S3, and its mate has the genotype S2S4. What proportion of their offspring would be expected to have five units of color
Biology
1 answer:
jeka57 [31]3 years ago
5 0

Answer:

25% of the progeny with genotype S3S4 is expected to express 5 units of color

Explanation:

<u>Available data</u>:

  • Skin color in a certain species of fish is inherited via a gene with four different alleles
  • allele S1 confers one unit of color, S2 has two units, S3 has three units, and S4 confers four units.

Cross:

Parentals) S1 S3   x   S2S4

Gametes) S1   S3      S2     S4

Punnett square)       S1           S3

                      S2     S1S2      S2S3

                      S4     S1S4      S3S4

F1) 1/4 = 25% of the progeny is expected to be S1S2, expressing 3 units of color ⇒ allele S1 provides one unit, allele S2 provides two units of color

    1/4 = 25% of the progeny is expected to be S2S3, expressing 5 units of color ⇒ allele S2 provides two units, allele S3 provides three units of color

    1/4 = 25% of the progeny is expected to be S1S4, expressing 5 units of color ⇒ allele S1 provides one unit, allele S4 provides four units of color

    1/4 = 25% of the progeny is expected to be S3S4, expressing 7 units of color ⇒ allele S3 provides three units, allele S4 provides four units of color

25% of the progeny with genotype S3S4 is expected to express 5 units of color

You might be interested in
1. If a pea plant’s alleles for height are tt, what is true of its parents?
omeli [17]
1. C) Both parents contributed a recessive allele
The offspring is homozygous for the recessive allele, which means it has two copies of it. Because each parent contributes one copy of the gene, this means that both parents contributed the recessive allele.

2. D) The offspring can be tall or short

The first cross between TT and tt will yield an F1 generation with the genotype Tt. When this generation is self-pollinated, the cross may result in the following genotypes:
TT, Tt, tt
Which means that the offspring can be tall or short.
4 0
3 years ago
How do environmental conditions influence species survival?
velikii [3]

Answer: The threats of environmental changes to the fitness, survival and reproductive success of individuals, and ultimately to the survival of species and ecosystems come from many directions: habitat destruction, disruption of food chains, changes in disease and parasitic loads, increased pollution and direct and indirect

Explanation:

3 0
3 years ago
Why did the black hand assassinate franz ferdinand.
chubhunter [2.5K]

Answer:

because of his perceived threat to Serbian independence.

Explanation:

The group included many radicals, government officials, professionals and army officers. When it was learned that the heir-apparent to the Austrian throne, Franz Ferdinand, was scheduled to visit Sarajevo in June of 1914, the Black Hand decided to assassinate him

7 0
3 years ago
What is the purpose of chromosomes in the nucleus?
attashe74 [19]

They are made of protein and one molecule of deoxyribonucleic acid (DNA). As the genetic material passes from parents to child, the chromosomes are responsible for containing the instructions that make the offspring unique while still carrying traits from the parent.

6 0
3 years ago
Read 2 more answers
Thigmotropism is a plants growth response to ____.
n200080 [17]
Light aka the sun I know for a fact
8 0
3 years ago
Read 2 more answers
Other questions:
  • Identify the stage of cellular respiration in which each of the following takes place.​
    5·2 answers
  • Revolution is the process of releasing mature eggs each month true or false
    8·1 answer
  • Does anyone know these
    14·1 answer
  • Many though not all mollusks have a shell. what secretes the shell
    5·1 answer
  • Which of the following is the flattened portion of a leaf? petiole
    8·1 answer
  • Which of the following may add salt to the ocean waters
    15·1 answer
  • 2
    8·1 answer
  • Water and food are both examples of _____ factors.
    7·1 answer
  • I NEED HELP IN THIS ONEEE
    15·1 answer
  • What makes an energy resource non-renewable? <br><br>Please explain well, will give brainliest.​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!