Answer:
C
Explanation:
The brother has different alleles for the blood type gene than his sister does. Blood type is inherited from parents like many other traits that can be displayed on a punnet square. Depending on what the parents blood type alleles were, the brother and sister could have different blood types.
A different number of chromosomes doesn't lead to different blood types, so D is wrong. And A is incorrect because the number genes also does not affect blood type. And I think the blood type genes are on the same chromosome, so B is wrong. C is correct because blood type is inherited by alleles, and different alleles can cause different traits, such as blood types.
Excitable cells like those found in muscle tissue are expected to be present in higher quantities in arteries than in veins.
<h3>What are Excitable cells?</h3>
Excitable cells are defined as those cells that are capable of generating electrical impulses when stimulated. Example of such cells include:
- muscle cells( smooth, skeletal and cardiac)
The artery is made up of higher amount of smooth muscles than the veins therefore, excitable cells like those found in muscle tissue are expected to be present in higher quantities in arteries than in veins.
Learn more about muscles here:
brainly.com/question/25778330
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Answer:
The answer is B.
Explanation:
Regarding the situation explained in the question that "African Americans are not affected by the malaria disease because of a specific genetic trait that they possess and that trait provides them with protection" can be explained by the answer given in option B.
Being heterozygous, meaning possessing a dominant and a recessive allele regarding that genetic trait, in terms of sickle cell trait which is a gene that causes the individual's blood cells to be sickle shaped and balanced polymorphism which means carrying two different versions of a gene is an argument that is enough to prove that the above statement is incorrect because it means they have blood cells that can be affected by the malaria disease.
I hope this answer helps.
There are two ways to do this. You could actually learn the phases and count each one. Since you're posting here, it's a safe bet you have no intention of actually learning the material. The second is to estimate based on the total number of cells. At any given time, you will have approximately the following percentages for each phase of the cell cycle:
Interphase - 96%
Prophase - 2.5%
Metaphase - .5%
Anaphase - .5%
Telophase - .5%
In the picture, there are about 120 cells. Now you have to do a little 5th grade math to calculate the approximate mumbers of each phase. So, for Interphase, we multiply 120 x .96 = 115. For Prophase we multiply 120 x .025 = 3. For Metaphase, Anaphase, and Telophase, we multiply 120 x .005 = .6, which rounds up to 1 each. Now, as I specified, these numbers are approximate. Looking at the picture, I count three that are in Metaphase, two that are in Anaphase, and at least three in Telophase. And there are more than three in Prophase. The best way to figure this out is to print the picture and, using a guide from the internet, count the cells in each phase, marking them off as you count them so that you don't recount them. Good Luck!
Answer:
The inheritance of ABO blood groups corresponds to an autosomal codominant pattern.
Explanation:
The blood type is defined by the presence of surface antigens in the red blood cell, called A and B. The presence of each antigen is determined by a gene present on the parental chromosomes.
- Blood type A corresponds to the presence of gene A, and its genotypic expression can be A/A or A/O.
- Type B blood, whose genotype is B/B or B/O, is due to the presence of a gene containing the B antigen.
- AB blood -due to codominance- has one gene for A and another for B, with genotype A/B.
- Blood type O, characterised by the absence of surface antigens, behaves like a recessive trait, which only manifests itself in the absence of surface antigens A and B. The genotype is O/O.
The presence of an antigen A or B, suppresses the expression of blood type O, recessive, which will be possible only in its homozygous form.
Learn more:
Factors responsible for ABO blood type brainly.com/question/2645377
