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Anonymous users2024-02-09This is the result of natural selection in the process of biological evolution, in the process of evolution of the monkey family, because the black coat color is easy to lead to the loss of small monkeys, ** coat color is not easy, long-term evolutionary development has changed the gene frequency of the coat color in the population, resulting in the continuous evolution of this organism in a certain direction. The accumulation of time is why it is said that "the little black langurs are all golden".
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Anonymous users2024-02-08The meaning of this sentence saves a lot of words, and he does this for the sake of the questions that arise in the hearts of the audience, that is, why are they all golden? And not black?
The reason why it is golden yellow is because of something like getting lost during evolution, which caused its cubs to have a short-term expression of shape. Your second scenario might happen in the process of evolution, where the cubs of all other colors have been eliminated, or that they have evolved a golden-yellow recognition.
All in all, he should be told from an evolutionary point of view.
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Anonymous users2024-02-07Because golden yellow is not easy to get lost, black is easier to get lost, and golden yellow belongs to the "fittest" in the evolution of species. Survival of the fittest. The "uncomfortable" gene of black is gradually eliminated. Therefore, the little black langurs we saw later were not easy to get lost, and they were golden.
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Anonymous users2024-02-06The fittest survive, the unfit are eliminated, maybe there used to be black ones, but after natural selection, the population gene frequencies of this species are changed (that is, what we call biological evolution), and the golden ones are retained.
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Anonymous users2024-02-05Tell you about it simply!
The mother monkey gave birth to baby monkeys, both yellow and black, and on the first day one of her black monkey babies was lost (the baby monkeys did not have the ability to survive independently, and died or were eaten), and the next day another black monkey baby was lost, and on the third day it was also....So in the end, all the yellow monkey babies grew up.
The baby yellow monkey wants to give birth when it grows up, so can the yellow monkey give birth to a black monkey? (Think about it briefly).
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Anonymous users2024-02-04It is the result of natural selection in the process of biological evolution.
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Anonymous users2024-02-03Solve the problems that high school biology students are prone to.
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Anonymous users2024-02-02The upstairs is so powerful that I won't say anything.
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Anonymous users2024-02-01According to the analysis of this question:
F1 red long abf2 red long ab red round ab white long a b white round ab
There are a total of 200 strains of F2, 32 strains of white round ABB, accounting for 16%, therefore, AB gametes account for 40% (16% square), and AB gametes are also 40%, (it can be seen that AB is located on a chromosome, AB is located on a chromosome) Then, the recombinant gametes AB and ABB each account for 10%, so the heterozygosity of the red circle ABB in F2 is 2 10% 40% = 8% This is a question in the Shanghai college entrance examination.
Genetic information is passed from father to child in the DNA carried by chromosomes found in every cell of an organism, and also in accessory genomes in organelles such as mitochondria and chloroplasts, but to a lesser extent. However, analysis of mutants of the hothead gene that have reverted mutations in Arabidopsis thaliana have shown that these plants can inherit the same information that is not present in the chromosomes of their parents but is the same as in the chromosomes of their grandfathers or more distant ancestors. This may involve template-guided recovery of ancestral DNA passed from an RNA repository that acts like a browser repository for old web pages.
Black birthmark is a congenital disease, mostly appears on the patient's face, arms, lower limbs and other parts, if the patient does not pay attention to the black birthmark disease, the birthmark will continue to grow, which will cause serious harm to the patient's future work and life. Most of the black birthmarks are congenital, and a small part are acquired, and women are prone to black birthmarks during pregnancy, which is related to endocrine, and some people with rheumatism and arthritis will also have black birthmark symptoms, I hope you will pay attention. In life, a black birthmark is a pigmented plaque that is black in color and varies in size and shape, which can cause serious harm to the patient's appearance. >>>More
Diabetes mellitus Congenital heart disease.
Congenital stupidity polydactyly (toe). >>>More
If there is no medical history in your family, then you have to check whether your mother's family has a medical history and then make a judgment, if not, then your brother may be caused by a gene mutation, you will not carry this disease-causing gene, and the child born will not have this disease, but for the sake of insurance, it is recommended that you still have a chromosomal test.
Influential. But the impact is not significant.
As for the impact, it depends on the type of genetic disease that affects your health in your family to make a conclusion. Therefore, I can't figure it out for you. >>>More