Ask a question about biology

The answer should not be.

Some traits are controlled by alleles, and some traits are controlled by paraalleles, in which case the allele is made up of two genes (when considering a pair of alleles), while the paraallele can be infinite, and all of them are alleles of each other (e.g., the allele of a is a, and its suballele can be a1, a1, a2, a2, or even more) For eukaryotes, a shape can be controlled by one or more pairs of alleles, These genes may be on one set of homologous chromosomes or more than one set of chromosomes. It can also be affected by both cytoplasm and chromosomes, such as the fertility of rice.

Therefore, they can be distinguished by their genetic characteristics, such as blood type, rice, and other classic cases.

It may be, for example, blood type; It is possible that it is not, as heterozygous and homozygous are different traits.

The answer to this question should be not necessarily.

Some traits are controlled by alleles and some traits are controlled by suballeles, in which case an allele consists of two genes (when considering a pair of alleles) and a number of paraalleles can be infinite, all of which are alleles of each other (e.g., an allele of a is a, and its suballele can be a1, a1, a2, a1, a2, a3, or even more).

Not necessarily eukaryotes and prokaryotes are not the same.

First of all, mammalian red blood cells are mature red blood cells by default, and they must be organelles such as non-chondria.

Secondly, actinomycetes certainly do not have mitochondria, which are unique to eukaryotes, but they have substances such as cytochromease and succinate dehydrogenase that are required for aerobic respiration. It has the same function as mitochondria.

Biology is just a relatively general knowledge Many of the contents of high school and college are different, and the content of different textbooks is also different, for example, some books say that actinomycetes are bacteria, and some books are separated.

Don't be obsessed with the topic, learn to be critical, learn something, it's a family's words, there are masters who want to guide.

Mature red blood cells do not have mitochondria, and red blood cells generally only have a lifespan of 120 days, which is relatively short.

In humans and other mammals, mature red blood cells are nucleated. This means that they have lost their DNA. Red blood cells also do not have mitochondria, they synthesize energy from glucose.

Mature mammalian erythrocytes are biconcave disc-shaped, which increases their surface area and makes it easier for substances to pass through their cell membranes.

Yes, landlord, your suspicions are correct.

I used this reference back then, but in the first edition. The landlord should use the second version. This reference is great for the first round of review and can enhance the memory of the basics.

In the book, there will be some wrong answers. I had a lot of them back then.

Landlord, you are right: actinomycetes are prokaryotic and have no mitochondria.

As for red blood cells, if not specifically stated, they generally refer to mature red blood cells. Don't pick the words too hard.

Immature red blood cells, which do have mitochondria in them.

There are still some mitochondria in the young immature red blood cells, reticulocytes, and through their secretion, a reticulocyte will form a reticular structure; If you use special staining, you can stain these reticulated structures, so these cells are called reticuocyte. After a series of differentiation, these bone marrow cells will begin to produce heme, so that the red blood cells have heme, but their nucleus and mitochondria and other structures will also disappear, and after differentiation and maturity, the red blood cells will leave the bone marrow and enter the circulatory system to perform their functions. Under normal circumstances, only mature red blood cells (which have completely lost their ribosomes) leave the bone marrow and enter the blood circulation.

But if red blood cells are not properly produced in large quantities, many reticulospheres can be found in the blood.

I wish the landlord a smooth entrance examination!