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
Debora [2.8K]
3 years ago
9

if a nondisjunction occurs at anaphase I of the first meiotic division, what will the proportion of banormal gametes (for the ch

romosomes involved in the nondisjunction)?
Biology
1 answer:
patriot [66]3 years ago
4 0

Correct question:

if a nondisjunction occurs at anaphase I of the first meiotic division, what will the proportion of abnormal gametes (for the chromosomes involved in the nondisjunction)?

Answer:

100%

Explanation:

Nondisjunction at meiosis-I means that two homologous chromosomes of at least one homologous pair fail to separate from each other during anaphase-I. This would result in the formation of one cell with one extra chromosome and the other with one less chromosome by the end of meiosis-I. Meiosis-II in these two cells would maintain this chromosome number in the daughter cells. Therefore, out of the total four gametes formed by the end of the meiosis, two would have one extra chromosome and would be denoted as "n+1". The rest of the two gametes would have one less chromosome and would be denoted as "n-1".

You might be interested in
Please hurry I need the right answer and I will give brainliest for the right answer no alien talk or file
kow [346]

Answer:

grasshopper

The organisms that eat the producers are the primary consumers. ... The primary consumers are herbivores (vegetarians

7 0
3 years ago
Read 2 more answers
Predict what the effect of a powerful fungicide that killed almost all fungi have on humans and animals. The humans and animals
tangare [24]
B. The amount of waste would build up and the toxins produced would harm the animals and humans
8 0
3 years ago
An example of a communicable disease is
Lynna [10]

Answer:

D giardiasis is the correct answer :)

5 0
2 years ago
Using the sliding flament theory, explain (or draw) the process of sarcomere shortening. Start from the point where calcium woul
Arte-miy333 [17]

Answer:

  1. Calcium binds to troponin C
  2. Troponin T moves tropomyosin and unblocks the binding sites
  3. Myosin heads join to the actin forming cross-bridges
  4. ATP turns into ADP and inorganic phosphate and releases energy
  5. The energy is used to impulse myofilaments slide producing a power stroke
  6. ADP is released and a new ATP joins the myosin heads and breaks the bindings to the actin filament
  7. ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, starting a new cycle
  8. Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.

Explanation:  

In rest, the tropomyosin inhibits the attraction strengths between myosin and actin filaments. Contraction initiates when an action potential depolarizes the inner portion of the muscle fiber. Calcium channels activate in the T tubules membrane, releasing <u>calcium into the sarcolemma.</u> At this point, tropomyosin is obstructing binding sites for myosin on the thin filament. When calcium binds to troponin C, troponin T alters the tropomyosin position by moving it and unblocking the binding sites. Myosin heads join to the uncovered actin-binding points forming cross-bridges, and while doing so, ATP turns into ADP and inorganic phosphate, which is released. Myofilaments slide impulsed by chemical energy collected in myosin heads, producing a power stroke. The power stroke initiates when the myosin cross-bridge binds to actin. As they slide, ADP molecules are released. A new ATP links to myosin heads and breaks the bindings to the actin filament.  Then ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, which starts a new binding cycle to actin. Finally, Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.

4 0
2 years ago
GIVING BRAINLIEST! I NEED THIS ASAP
Makovka662 [10]

Answer:

I think c

Explanation:

6 0
2 years ago
Other questions:
  • 1. What special structures are specific to the phylums of Porifera, Cnidaria, Ctenophora, and Platyhelminthes?
    9·1 answer
  • PLEASE HELP AND FAST THANK YOU!!!
    10·1 answer
  • In the process of aerobic respiration, the Krebs Cycle (Citric Acid Cycle) occurs in the
    10·2 answers
  • Characteristics of plant cells include which of the following? no cell wall, only plasma membrane large hypertonic vacuole no ch
    5·1 answer
  • Why does the reduction of the dye DCPIP work best using the chloroplasts whose outer envelopes have been damaged during preparat
    5·1 answer
  • Whoever answers gets brainlist!
    14·2 answers
  • Mrs. Lopez is a chemist who is studying salt crystals. She wants to slow the rate at which the crystals dissolve in a solution o
    8·1 answer
  • PLEASE HURRY!!!!!!!!!!!!!
    15·1 answer
  • Two cells have surface area to volume ratios of 1:1 and 5:1. Which one has the ability to move nutrients in and expel wastes the
    9·1 answer
  • To reduce one molecule of o2 how many electrons passed through electron transport chain.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!