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
Svetllana [295]
3 years ago
6

Ở đậu Hà Lan, gen A quy định thân cao trội hoàn toàn so với alen a quy định thân thấp. Cho cây thân cao giao phấn với cây thân c

ao, thu được F1 gồm 900 cây thân cao và 299 cây thân thấp. Tính theo lí thuyết, tỉ lệ cây F1 tự thụ phấn cho F2 gồm toàn cây cao so với tổng số cây cao ở F1 là bao nhiêu?
Biology
1 answer:
Bad White [126]3 years ago
6 0

Answer:

Ở đậu Hà Lan, A- thân cao, a-thân thấp. Cây thân cao giao phấn với cây thân cao — F1 có tỷ lệ 900 thân ca0:299 thân thấp — tỷ lệ 3:1 — cây thân cao có kiểu gen dị hợp Aa. Tỷ lệ F1 tự thụ phấn cho cho F2 toàn cây thân cao → F1 đồng hợp AA → chiếm 1 phần 4

P: Aa x Aa → 1 phần 4 AA: 2 phần 4 Aa: 1 phần 4 aa

You might be interested in
10.
ipn [44]
Nervous system is the body system that is involved in coordinating and controlling body movements
4 0
2 years ago
Lactic acid fermentation occurs in
Wewaii [24]
Lactic acid formation occurs in B) The yeast cell.
8 0
4 years ago
Diffusion is an important process in animals and plants.
Paraphin [41]

Answer:

Diffusion helps animals in respiration. The cells in an animal's body need glucose and oxygen for respiration. Both these are carried in the blood. When blood reaches the cells the molecules of glucose and oxygen diffuse out of the blood and into the cells. As cells use up the glucose and oxygen they produce waste chemicals and carbon dioxide.

Diffusion is a very important process for photosynthesis where carbon dioxide from the stomata diffuses into the leaves and finally into the cells. This helps the plants to photosynthesize and produce more food.

Example for animals: Animals using glucose and oxygen in diffusion.

Examples for plants: Plants using carbon dioxide to photosynthesize.

8 0
3 years ago
Which cellular structure do organisms in the kingdoms Eubacteria, Archaebacteria, and Protista have in common?
liberstina [14]

Answer:

I believe the answer is B.

Explanation:

Hope my answer has helped you and if not i am sorry.

8 0
4 years ago
Dark, cooler areas on the sun's surface are called ____.
luda_lava [24]
They are called
a. sunspots
7 0
3 years ago
Read 2 more answers
Other questions:
  • If something exhibits all of the characters of life , it is considered to be ______
    8·2 answers
  • Science has shown how information can only be gathered by the known laws of physics and chemisty.
    14·1 answer
  • Which structure of the respitory system plays the main role in carry out systems primary function​
    11·2 answers
  • The temperature in the upper atmosphere is -2°C, and the temperature on Earth’s surface is 5°C. Which type of weather is most li
    10·1 answer
  • Chronic fatigue syndrome results from repeated motions performed in the course of normal work and daily activities. a. True b. F
    5·1 answer
  • In the oceans the colder water sinks into deep basins, while warmer water stays closer to the surface. The water then moves arou
    5·2 answers
  • What is the major difference between a somatic cell and an egg cell?
    6·1 answer
  • Harvesting a forest intermittently for lumber, as well as periodically clearing out underbrush and dead tress, is known as
    6·1 answer
  • What is the difference between resolution and magnification??
    7·1 answer
  • 6.The original source of all the energy in the ecosystem is the
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!