Why do you have to multiply the same plant? Why should I go male if I have an equiecious flower

The same plant and different flowers need to be multiplied because some flowers are female flowers and some flowers are male flowers, and they can only be pollinated together.

The main purpose is to prevent self-pollination from self-inbreeding.

Generally, emasculation is used for artificial cross-pollination.

Monoecious: A tree has both male and female flowers, which can be divided into two situations: one flower (the pistils and stamens are all there) and two flowers (one is only male and one is just female, but both are on this tree).

Monoecious is the second case.

Monoecious plants are simply self-pollinating plants that contain both stamens and pistils. There are two cases: one is a plant with male and female flowers on it, but the flowers are unisexual; There is also a hermaphroditic flower, which has both pistils and stamens.

1. The genotype of the same plant and different flowers is exactly the same. It's just different parts of the same plant, of course, the genotype is the same, but the expression is different, so that flowers of different sexes appear.

2. The question is a bit messy, can you give the original title?

Question 1: Not necessarily the same. Question 2: It should be okay, if the offspring are all yellow, it means that the corn is purebred, if there are other colors, it means that the corn is heterozygous.

Homopollination and cross-pollination both refer to the cross-pollination of plants, therefore, there is no difference between the two.

There are 3 differences between cross-pollination and self-pollination:

First, the characteristics of the two are different:

1. Characteristics of cross-pollination: cross-pollination is a very common pollination method in the plant kingdom. Its pollen is spread mainly by wind or insects.

Flowers that rely on insect pollination are called insect-borne flowers, such as the flowers of pears, apples, peaches, citrus, pumpkins, rape, and other plants. Insect flowers are characterized by large, brightly colored flowers, a strong fragrance and sweet honey juice that are used to attract insects, and the pollen is larger, with protrusions or stickiness on the outer wall that easily attach to the body of the insect.

2. Characteristics of self-pollination: the flowers of self-pollinating plants must be hermaphroditic flowers, and the female and stamens are very close to each other, and the pollen is easy to fall on the stigma of the flower; The female and stamens should mature at the same time. However, plants with hermaphroditic flowers are not necessarily self-pollinating.

Angiosperms are mostly cross-pollinated, and a few are self-pollinated.

Second, the overview of the two is different:

1. Overview of cross-pollination: Cross-pollination refers to the pollination between different plants, cross-flowers and different clones. Some plant stamens and pistils do not grow in the same flower, or even on the same plant, these flowers cannot pollinate themselves, and their pistils must get the pollen of another male flower, which is called cross-pollination.

2. Overview of self-pollination: refers to the phenomenon that the pollen of this flower falls on the stigma of the pistil of this flower (different from cross-pollination). A few plants in nature are self-pollinating, such as barley, wheat, soybeans, etc.

Third, the impact of the two is different:

1. The effects of cross-pollination: cross-pollination can prevent inbreeding and reduce the survival rate. When genetically identical individuals undergo autofertilization or inbreeding between close relatives, the likelihood of inferior gene pairing producing inferior offspring increases.

Seeds formed by inbreeding plants do not mature smoothly. Even if they are able to mature, the seeds will be small in size and will most likely not be able to germinate. It is also impossible for the plants that these seeds develop into to thrive. Seeds grown by inbreeding in pine trees will stop developing very early.

2. The influence of self-pollination: the egg cells and sperm cells of self-pollinated plants are produced under the same conditions, the difference in genetic heterogeneity is small, and the offspring produced after fusion are weak. Long-term self-pollination will gradually decline the viability of offspring, and the way to overcome it is to implement inter-species hybridization.

Let's explain it this way: there are two plants A and B, each plant has two flowers numbered A1, A2, B1, B2 respectively, so that cohabitation cross-pollination is A1A2 pollination with each other, hetero-cross-pollination is pollination between A1B1, A1B2, A2B1 or A2B2, and self-pollination is A1A1, A2A2, B1B1, B2B2 and other pollination.

Pollination between different flowers of a plant is called same-plant cross-pollination. A plant can produce many flowers.