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
horrorfan [7]
3 years ago
7

In Drosophila, the autosomal recessive pr and cn mutations cause brown and bright-red eyes, respectively (wild-type flies have b

rick-red eyes). Flies who are homozygous recessive at both pr and cn have orange eyes. A female who has wild-type eyes is crossed to an orange-eyed male. Their progeny have the following distribution of eye colors:
10 wild-type
240 brown
240 bright red
10 orange

The mother of these progeny resulted from a cross between flies from two true-breeding lines.
What are the genotypes of these two lines?
Biology
1 answer:
Nadusha1986 [10]3 years ago
6 0

Answer:

Option B

Explanation:

Complete question is

The original mother resulted from a cross between two flies from true breeding lines.

What are the genotypes of these two lines? (Note that the chromosomes are NOT

indicated this time).

a) pr+ pr+ cn cn and pr pr cn+ cn+  

b) pr+ pr+ cn+ cn+ and pr pr cn cn  

c) pr+ pr+ cn cn and pr pr cn cn  

d) pr pr cn+ cn+ and pr+ pr+ cn cn  

e) either a) or d) could be true.

Solution

True breeding species will have the same  allele pairs for their characteristic traits.

It is given that mother of the progeny has arisen from two  true breeding lines

Thus,  both the parents must have same allele in the allele pair of their genotype

Also the female has wild type eyes, thus her genotype would be pr+cn/pr

Therefore the genotype of parents is

pr+ pr+ cn+ cn+ and pr pr cn cn

There by producing all offspring with genotype  pr pr + / cn cn+

Hence, option B is correct

You might be interested in
The main difference between the four nucleotides that make up DNA is that they have ?
marissa [1.9K]

The nucleotides in DNA contain four different bases, those of which being nitrogenous bases.

The four bases are:

1 - Thymine

2 - Cytosine

3 - Adenine

4 - Guanine

Hope this helps you. Do mark me as brainliest.

6 0
2 years ago
Read 2 more answers
Can someone please help me I'll give you brainliest I promise boo❤️
alekssr [168]

Answer:

The correct answer is Thermosphere.

Explanation:

I had the same question before and this was the correct answer.

5 0
3 years ago
In food chains, the flow of energy is ALWAYS
n200080 [17]
Becausebof he law of conservation of evergy. Evergy can not be created of eliminated, therefore it has to be transfered in this case the energy is transfered from one organism to the otherand this process continues at an endless cycle
6 0
3 years ago
What is a compound microscope and who invented it?
Marianna [84]

Answer:

instrument that is used to view magnified images of small objects on a glass slide

Explanation:

Zacharias Janssen

4 0
2 years ago
40. Intrapulmonary pressure is the
AleksAgata [21]

Answer:

pressure within the alveoli of the lungs

Explanation:

Pulmonary ventilation involves three different pressures:

Atmospheric pressure

Intra Alveolar (intrapulmonary) pressure

Intrapleural pressure

Atmospheric pressure is the pressure of the air that is exerted outside the body. Intrapulmonary pressure is the pressure exerted inside the alveoli of the lungs. Intrapleural pressure is the pressure within the pleural body cavity.

7 0
3 years ago
Other questions:
  • Which of these would best describe the outcome of increasing the kinetic energy of the molecules in the above picture
    8·2 answers
  • How does a plant benefit from having a cell wall around the cell membrane?
    7·1 answer
  • Acrostic poem for star with detail and substance <br><br> S-<br><br> T-<br><br> A-<br><br> R-
    9·1 answer
  • Where do sperm go after leaving the ejaculatory duct?
    12·2 answers
  • Are kangaroo rats decomposer, producer, herbivore, carnivore
    12·1 answer
  • The Global Youth Tobacco Survey asks youth to fill in the answers to several questions about their tobacco use. In this survey c
    6·1 answer
  • What process completed division in a animal cell?
    12·2 answers
  • What decomposes animals in a rainforest?
    12·1 answer
  • Why are conifers so common in American forests?
    12·1 answer
  • You finished harvesting produce from your garden at the end of the summer. Over the fall and winter months, the garden was left
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!