The Elements of Life In biology, the elements of life are the essential building blocks that make up living things. They are carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur. The first four of these are the most important, as they are used to construct the molecules that are necessary to make up living cells. These elements form the basic building blocks of the major macromolecules of life, including carbohydrates, lipids, nucleic acids and proteins. Carbon is an important element for all living organisms, as it is used to construct the basic building blocks of life, such as carbohydrates, lipids, and nucleic acids. Even the cell membranes are made of proteins. Carbon is also used to construct the energy-rich molecules adenosine triphosphate (ATP) and guanosine triphosphate (GTP). Hydrogen is used to construct the molecules water and organic compounds with carbon. Hydrogen is also used to construct ATP and GTP. Nitrogen is used to construct the basic building blocks of life, such as amino acids, nucleic acids, and proteins. It is also used to construct ATP and GTP. Oxygen is used to construct the basic building blocks of life, such as carbohydrates, lipids, and nucleic acids. It is also used to construct ATP and GTP. Phosphorus is used to construct the basic building blocks of life, such as carbohydrates, lipids, and nucleic acids. Show
In 1981, a stray black cat with unusual rounded, curled-black ears was adopted by a family in California. Hundreds of descendants of the cat have since been born, and cat fanciers hope to develop a true–breeding variety. How would you determine whether the curl allele is dominant or recessive? How would you obtain true-breeding curl cats? How could you be sure they are true-breeding?
The curl allele is a dominant condition confirmed by crossing the stray cat with curled feature with the non-curled cat. True breeding curl cat is obtained by the breeding of the curled cat with another curled cat. True breeding is confirmed by crossing the homozygous individual with the heterozygous individual. Much of what you look like comes from a combination of your parents’ DNA. Your hair’s texture and color are no exception. Genetic information that’s embedded in your body creates a formula for what your hair is going to look like throughout your lifetime. Other factors, like nutrition, health conditions, and hormones, have less impact than the DNA that you’re born with. If both of your parents were born with curly hair, chances are that you’ll be born with curly hair, too. But there are cases where two curly haired parents can produce a child with straight or wavy hair. Curly hair is considered a “dominant” gene trait. Straight hair is considered “recessive.” To put that in simple terms, that means that if one parent gives you a curly-haired gene and the other parent gives you a straight-haired gene, you’ll be born with curly hair. Both of your parents give you two pieces of genetic information, called alleles, that determine what your hair type will be. The two alleles from your biological father combine with two alleles from your biological mother, giving you four in all. Typically, a dominant gene is one that overpowers a recessive gene when two different characteristics are present in one piece of DNA. The dominant gene will become the visible trait in the person born with both characteristics in their DNA. A recessive gene is a piece of genetic information that you can’t see, but that you may carry. Let’s say that your father has curly hair. That doesn’t mean that both of his alleles are for curly hair. Since curly hair is dominant, he may have been born with curly hair but carry an allele for straight hair, too. Let’s also say that your mother has straight hair. Maybe she inherited two alleles for straight hair. That would mean you’ve got three alleles for straight hair, and only one for curly hair. You could very well be born with straight hair, or pass the possibility of having straight hair down to your children. There isn’t necessarily one single gene that causes your hair to become curly. Your hair type is the result of how your parent’s DNA combines, in addition to your ethnicity. Studies suggest that people with different ancestral histories have different genes that are responsible for their hair type. There are some human traits and health conditions that are determined by the genes passed through the sex chromosomes (X and Y chromosomes). These are called sex-linked traits. The way your hair looks is neither Y-linked or X-linked. The only exception to this would be if you have a genetic health condition with symptoms that impact the way that your hair appears. In some cases, these genetic health conditions may be linked to a single gene or a single mutation within a single gene. Being born with curly hair doesn’t mean that your hair will have that texture for the rest of your life. Hormonal changesHormones can influence your hair follicle structure at different points of your life. Researchers still don’t completely understand all of the scenarios that can cause this to happen. You may notice that your curly hair becomes thicker, heavier, or less curly during pregnancy, for example. You may see your hair become less curly if it thins out postpartum. Hormone fluctuations during menopause may also cause hair texture to change. EnvironmentThere’s also the matter of your immediate environment. Maybe you’ve lived in a humid climate all of your life but move to the dry, cool mountains. Your hair’s texture may look a little different with the change in altitude, humidity, and even the water you’re using to wash your hair. Health conditionsCertain health conditions can change the way that your hair texture looks, permanently or temporarily. Alopecia can diminish the thickness of your hair, making it appear less wavy. Medications and treatments like chemotherapy can also change the look and feel of your hair. NutritionFinally, there’s the food that you eat and the nutritional supplements that you take. There’s no magic food or vitamin that you can consume that will make your hair look a certain way. But pursuing and prioritizing your health by eating a varied, well-balanced diet and meeting all of your nutritional needs can make a difference in how your hair looks. When you’re at your healthiest, your hair may look shinier, fuller, and more natural, and your hair’s texture may vary accordingly. Curly hair is determined by factors you inherit from your biological mother and your biological father. There’s no single gene that determines the way that your hair looks. The way your hair looks when you’re born is also a clue into the genetic information you’d pass to your own children if you have them. While your hair texture may vary throughout your life, that doesn’t mean that your DNA has changed. Factors like hormones, nutrition, and your environment can make your hair fiber appear more curly or less curly throughout your lifetime. How would you determine whether the curl allele is dominant or recessive?How would you determine whether the curl allele is dominant or recessive? Mate the stray to a non-curl cat. If any offspring have the "curl" trait it is likely to be dominant.
How would you determine whether the curl allele is dominant or recessive How would you obtain true breeding Curl cats How could you be sure they are true breeding?You would obtain some true-breeding offspring homozygous for the curl allele from matings between the F1 cats resulting from the original curl X noncurl crosses whether the curl trait is dominant or recessive. You know that cats are true-breeding when curl x curl matings produce only curl offspring.
How would you obtain true breeding Curl cats How could you be sure they are true breeding?True breeding curl cat is obtained by the breeding of the curled cat with another curled cat. True breeding is confirmed by crossing the homozygous individual with the heterozygous individual.
How would you be sure they are true breeding?A true breeding is a kind of breeding wherein the parents would produce offspring that would carry the same phenotype. This means that the parents are homozygous for every trait. An example of true breeding is that of the Aberdeen Angus cattle.
|
How would you determine whether the curl allele is dominant or recessive How would you obtain true
zusammenhängende Posts
Urheberrechte © © 2024 de.apacode Inc.
