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
exis [7]
3 years ago
12

In maize, liguleless (l) is recessive to having ligules (L), and dwarf (d) is recessive to tall (D). These two genes are linked

on chromosome 3. A cross is made and the F2 consisted of the following progeny:
F2 phenotype Number of progeny
Ligules, tall 6156
Liguleless, tall 1344
Ligules, dwarf 1344
Liguleless, dwarf 1156

a. In this cross, are these genes in coupling or repulsion? Why?
b. What were the phenotype and the genotype of the P and F1 generations?
c. Calculate the percent recombination between these two genes.
Biology
1 answer:
bearhunter [10]3 years ago
8 0

Answer:

given,

LL║ll  and DD║dd,

after crossing over,    Ld║Ld  ×   lD║lD

LLdd × llDD

in F1 generation, they will give, LLll, DDdd, LLDD, lldd → LlDd

in eF2 generation, the offsprings will be, LLll  ×  DDdd

LLDD ,LLdd, LLDd, llDD, lldd, llDd, LlDD, Lldd, LlDd

1. yes, these genes are coupling.

2. → phenotypes of parental genes = ligules, liguleless, tall and dwarf

    genotypes of parental genes= LLdd, llDD i.e; heterozygous

 →   phenotypes of F1 generation = 25% Ligules, 25% tall, 25% ligules-tall, 25% liguleless-dwarf

      genotypes of F1 generation = heterozygous ; LlDd that is ligules-tall

3. recombination frequency= no of recombinant / total progeny × 100%

                                              = (1344+1344) / 6156+1344+1344+1156  × 100%

                                              = 2688/ 10000 × 100%

                                              = 26.88 %

that means linkage happened

and the map distance is 26.88 map unit.

You might be interested in
What is the reason that a modern electron microscope (TEM) can resolve biological images to the subnanometer level, as opposed t
Alex Ar [27]

Answer:

C. Electron beams have much shorter wavelengths than visible light

Explanation:

A beam of electrons is used to illuminate and create magnified images of specimens in an electron microscope. The resolution of a microscope increases with a decrease in the wavelength of the light it uses for illumination. The wavelength of electrons used in the electron microscope is about 100,000 times shorter than that of visible light. Therefore electron microscopes have a resolution thousand times better than the light microscope.

8 0
3 years ago
How do fish obtain oxygen?
vaieri [72.5K]
<span>d- They take in oxygen gas dissolved in the water through their gills. </span>
5 0
3 years ago
What important process happens at the capillaries?
Zarrin [17]

Answer: Capillaries connect the arterial system — which includes the blood vessels that carry blood away from your heart — to your venous system. Your venous system includes the blood vessels that carry blood back to your heart. The exchange of oxygen, nutrients, and waste between your blood and tissues also happens in your capillaries.

5 0
3 years ago
What is the end result and purpose of meiosis?
Sedaia [141]
The answer is 4 gametes that have the number of chromosomes....
5 0
3 years ago
In which part of the body would you find striated muscle tissue with relatively small cells that have one or two nuclei?
Ilya [14]

Answer: Heart

The striated muscle tissue with relatively small cells that have one or two nuclei can be found at the heart. The intracellular calcium signaling is an intrinsic component of signal transduction pathways that regulate vital aspects of muscle function including excitability, force production, protein synthesis, and energy expenditure that occurs in the striated muscle tissue of the heart. 

3 0
3 years ago
Read 2 more answers
Other questions:
  • What are two of the most common ways that viruses are spread?
    5·2 answers
  • How does overtillage harm soil
    5·1 answer
  • Why did the federal government use a laissez-faire approach to big business?
    8·2 answers
  • Urgent! will mark brainliest!
    9·2 answers
  • How do tumors form as a result of errors in mitosis
    9·1 answer
  • Rabbits introduced into Australia over 100 years ago have become a serious pest to farmers. Rabbit populations increased so much
    12·2 answers
  • Starting in 1850 when Europe become industrialized, the frequency of melanic forms of the peppered moth in populations ______ un
    10·1 answer
  • According to cpt, an endoscopy that is undertaken to the level of the midtransverse colon would be coded as a
    13·1 answer
  • HELP PLS I WILL GIVE U BRAINLY
    13·1 answer
  • Explain Natural Selection
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!