Answer: 47 Chromosomes
Explanation: People with Down syndrome typically have three copies of chromosome 21 in each cell, for a total of 47 chromosomes per cell.
Answer: Income
Explanation:
In the ecosystem energy budget, primary productivity is like income. This is because primary production is the way in which energy enters an ecosystem.
I hope this helps :}
Answer:
reduced hybrid fertility
Explanation
The formation of mules from the cross between female horses (mares) and male donkeys (jacks) is an example of reduced fertility because the mules are sterile and they cannot give birth to babies.
Reason:
Because mule cannot produce sperms. This has to do with his genetics. A mule has 63 chromosomes in total. He gets 32 chromosomes from his mom (that is a horse) and 31 chromosomes from his Dad (that is a donkey). As we know, it is very important for reproduction that chromosomes hould be present in two sets with equal numbers.
To reproduce he needs equal number of chromosomes because we know during meiosis chromosomes segregate and half number goes in daughter cells. But in case of mules he has an extra chromosome due to which he cannot undergo correct meiosis and produce sperms. That is ahy he stays sterile throughout his life. This is called reduced hybrid fertility
Hope it helps!
Answer:
they can cause a lot of harm in human body
Explanation:
based on research, a virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism.
Bacteria are a type of biological cell. They constitute a large domain of prokaryotic microorganisms.
and lots more all can do a lot of damage to the human body they can even take someone's life.
