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
OlgaM077 [116]
3 years ago
8

You perform a test cross of the dihybrid AaBb and score the phenotypes of 1000 progeny. Assuming independent assortment, how man

y of the progeny do you expect to display the dominant phenotype for both the A and B genes?
- 750
- 100
- 250
- 500
- 200

Biology
1 answer:
ahrayia [7]3 years ago
8 0

Answer:

250.

Explanation:

A test cross would cross the genotype AaBb with homozygous recessive genotype aabb. The cross between AaBB x aabb would produce progeny in 1:1:1:1 ratio. So, the proportion of the progeny expressing both dominant traits (AaBb) is 1/4.

Therefore, out of the total 1000 offspring, 1/4 x 1000= 250 would express the dominant phenotype for both A and B genes.

You might be interested in
Please help!!! I will mark you the BRAINLIEST
Dahasolnce [82]

Answer:

Molecules stop moving at freezing point. Helium has the lowest boiling point. The molecules move very quickly at boiling point.

Explanation:

Heating up- molecules move faster. Cooling down- molecules move slower

7 0
2 years ago
The information from messenger RNA is used to create polypeptide sequences during the process of _____.​
polet [3.4K]

Answer:

Translation

Explanation:

The translation is the process during which the nucleotide sequence of the mRNA is read in the form of genetic codes. The nucleotide sequence of mRNA is complementary to the template DNA strand. According to the sequence of the nucleotides in the mRNA, the amino acids are added in a specific order to make the polypeptide chains. The process occurs on ribosomes. The ribosomes move along the mRNA to read its sequence and the tRNA brings are amino acids to be added to the polypeptide chains.

8 0
3 years ago
The muscles of the digestive tract are called smooth cardiac muscles? true or false
Blababa [14]

Answer:Smooth muscle or “involuntary muscle” consists of spindle shaped muscle cells found within the walls of organs and structures such as the esophagus, stomach, intestines, bronchi, uterus, ureters, bladder, and blood vessels.

Explanation:

Smooth muscle or “involuntary muscle” consists of spindle shaped muscle cells found within the walls of organs and structures such as the esophagus, stomach, intestines, bronchi, uterus, ureters, bladder, and blood vessels.

8 0
3 years ago
Describe two examples of negative effects air pollutants have on the human respiratory<br> system
Serjik [45]

Answer:

irritate people's breathing, ling cancer, asthma

Explanation:

Particulate matter in the air decreases life expectancy according to many researchers. Pollutants such as ozone irritate people's breathing, trigger asthma symptoms and cause lung and heart diseases. Exposure to environmental tobacco smoke causes many severe respiratory health problems such as asthma and lung cancer.

5 0
3 years ago
Read 2 more answers
What are the products of the replication of one DNA molecule? Select one: A. two strands joined into one double-stranded DNA mol
Dima020 [189]
Two identical double-stranded DNA molecules
3 0
3 years ago
Read 2 more answers
Other questions:
  • Will there be water flow into or out of the fish without proper homeostatic processes? Will the fish experience "bloating" or "d
    14·1 answer
  • A green pigment in chloroplasts that traps light energy from the sun
    15·1 answer
  • What are three characteristics of equisetophyta ​
    9·1 answer
  • 3. Water molecules tend to stick together because *
    13·1 answer
  • ANSWER FOR BRAINLIEST AND 40 POINTS!!!!!!
    8·1 answer
  • How does sequencing genes provide evidence for evolution
    11·2 answers
  • If you can help please
    14·1 answer
  • Nêu 2 cách hoạt động của glutathion trong tế bào hồng cầu
    14·1 answer
  • What is photosynthesis​
    13·2 answers
  • 1. What class of biological molecules does sugars belong to?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!