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
german
3 years ago
7

In corn, the allele A allows the deposition of anthocyanin (blue) pigment in the kernels (seeds), while aa plants have yellow ke

rnels. At a second gene, W– produces smooth kernels, while ww kernels are wrinkled. A plant with blue smooth kernels was crossed to a plant with yellow wrinkled kernels. The progeny consisted of 1447 blue smooth, 169 blue wrinkled, 186 yellow smooth, and 1510 yellow wrinkled.
a. Are the a and w loci linked? If so, how far apart are they?
b. What was the genotype of the blue smooth parent? Include the chromosome arrangement of alleles
c. If a plant grown from a blue wrinkled progeny seed is crossed to a plant grown from a yellow smooth F, seed, what kinds of kernels would be expected, and in what proportions?
Biology
1 answer:
lara31 [8.8K]3 years ago
5 0

Answer:

<h2>A) Yes, 12 mu</h2><h2>B) AaWw</h2><h2>C) 0.25%</h2><h2 />

Explanation:

As given,

Allele A for  blue anthocynin.

aa for yellow kernel;

at  second locus;

W produce smooth kernel,

ww for wrinkled kernel;

Parents as given are:  AaWw and aaww

Progeny are:

blue smooth ( AaWw)= 1447;

blue wrinkle (Aaww)= 169;

yellow smooth (aaWw)= 186;

yellow wirnked (aaww)= 1510

a)

Recombinant progeny are  169+ 186= 355

non- recombinant progeny are = 1447+ 1510= 2957

so recombination frequency (RF)= 346/2957×100= 12.0054%

So a and w are linked genes.

They are 12 mu far away from each other.

b) Blue smooth parent= AaWw.

c) Aaww crossed with  aaWw

progeny are= AaWw, Aaww, aaWw, aaww,

They all are produced in same proportion =0.25% or 1/4.

You might be interested in
Aerobic respiration extracts more energy from a glucose molecule than any other type of respiration. Why might some organisms th
a_sh-v [17]

because the products of the process, such as ethanol, contain more energy than does carbon dioxide, the product of aerobic respiration.

8 0
3 years ago
Wertyuiyfdsdfg1wertyklgfdfghjkl
Tanzania [10]

Answer:

♡hi there! ♡

good combo of words and numbers! ʕ •ᴥ•ʔ

hope I could help! have a great day

-madeline

✧・゚: *✧・゚:・゚✧*:・゚✧・゚: *✧・゚:・゚✧*:・゚✧

Explanation:

7 0
3 years ago
If A/A ⋅ B/B is crossed with a/a ⋅ b/b and the F1 is testcrossed, what percentage of the testcross progeny will be a/a ⋅ b/b if
Alex787 [66]

Answer:

a) 25%; b) 50%; c) 45%; d) 38%

Explanation:

<h3 /><h3>a) Unlinked genes</h3>

A/A B/B X a/a b/b

F1: A/a B/b

Testcross A/a B/b X a/a b/b

The homozygous recessive individual only produces <em>ab</em><em> </em>gametes.

The F1 produces four types of gametes (each of them with a frequency of 1/4):  <em>AB</em>, <em>Ab</em>, <em>aB </em>and <em>ab</em>.

25% of the progeny will be a/a b/b.

<h3>b) Completely linked genes</h3>

AB/AB X ab/ab

F1: AB/ab

Testcross AB/ab X ab/ab

The F1 produces only two types of gametes, the parentals (each of them with a frequency of 1/2):  <em>AB</em> and <em>ab</em>.

50% of the progeny will be ab/ab.

<h3>c) 10 m.u. apart</h3>

AB/AB X ab/ab

F1: AB/ab

Testcross AB/ab X ab/ab

The F1 produces four types of gametes, the parentals <em>AB</em> and <em>ab </em>and the recombinants <em>Ab</em> and <em>aB</em>.

Since the genes are 10mu apart, 10% of the produced gametes will be recombinant and 90% will be parentals. Since there are two types of parental gametes, each of them has a frequency of 45%.

45% of the progeny will be ab/ab.

<h3>d) 24 m.u. apart</h3>

This is very similar to c).

Since the genes are 24mu apart, 24% of the produced gametes will be recombinant and 76% will be parentals. Since there are two types of parental gametes, each of them has a frequency of 38%.

38% of the progeny will be ab/ab.

5 0
3 years ago
What time of the year is bacterial and fungal activity at a high ?
bekas [8.4K]

Around Autumn as the temp and pH of soils are vlose the the optimum

8 0
3 years ago
Which part of the earth system interacts with solar flares?
ss7ja [257]
The magnetosphere interacts with solar flares. It helps to redirect them. Otherwise, the Earth would be greatly heated and human life would become much harder to sustain, as homeostasis would require better cooling mechanisms.
5 0
3 years ago
Other questions:
  • 6) When DNA is copied, sometimes a new, incorrect, base pairing appears within the structure of a new DNA molecule replacing ori
    9·2 answers
  • According to the phylogenetic tree, which organisms are the least related to each other evolutionarily
    8·1 answer
  • Select the choice that best completes the following sentence: A normal human body cell has a total of ___ chromosomes: ___ chrom
    8·2 answers
  • Explain the difference between respiration and breathing?
    6·1 answer
  • ? C6H12O6 + O2 → 6 CO2 + 6 H2O ΔG = –686 kcal/mol This reaction represents cellular respiration. What happens to the energy rele
    13·1 answer
  • Please help me with this question!!!!
    14·1 answer
  • 5. Which of the rock samples below is most likely to be a metamorphic rock?
    8·2 answers
  • How do different restrictive enzymes produce different DNA fragments from the same DNA molecule?
    11·1 answer
  • Can someone help me with this bio assignment?
    9·2 answers
  • the protein hemoglobin carries oxygen from the lungs to the tissues. this is an example of protein's role in
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!