Biology Question help please?
A person that receives the defective gene from both father and mother develops the disease; a person that receives one defective and one healthy allele remains healthy, but can pass on the disease and is known as a carrier. If two parents who are carriers have a child, there is a 1-in-4 chance of their child developing the disease and a 1-in-2 chance of their child's being just a carrier. Since the gene is incompletely recessive, carriers can produce a few sickled red blood cells, not enough to cause symptoms, but enough to give resistance to malaria. Because of this, heterozygotes have a higher fitness than either of the homozygotes. This is known as heterozygote advantage.
Biology help? Phenotypes & autosomal recessive trait?
There should be so significant difference in the amount of males to females that have the disease if it is a recessive autosomal disorder as neither a male or female are more likely to have the disease. If a disease is X linked and recessive, the phenotype of a woman with only one recessive allele is that she will not have the disease. Her genotype will be XaXA (A being dominant to a). If a man has only one recessive allele of the same disease, his pheotype will be that he has the disease. His phenotype will be XaY becuase for men they only need one recessive allele to have exoress the disease in the phenotype.
Biology Question / Autosomal Dominant and Recessive...?
First of all, without knowing anything about the disease, NO. If it's autosomal, then it's NOT on the X-chromosome, by definition. Now, then. What's actually going on is that the disease can be caused by many different mutations in many different genes. Think of a car that won't drive - it might be because you're out of gas, or because your battery is dead, or because your belts are broken, etc, etc. Many different causes - same outcome. It's the same thing here. Many different genes can be affected. Some of these mutations are dominant, and some are recessive. So if you have one copy of mutation X in gene x, you get the disease, because that particular mutation is dominant. Or you might have a perfectly functional gene x, but you have the disease because you have two copies of mutation Y in gene y, and that mutation is recessive. And so forth.
I need help on two biology questions?
Joe has an inherited disease, while his wife Mandy does not have the disease. Joe and Mandy have four sons and four daughters. All the daughters have the disease, but none of the sons does. What pattern of inheritance is most likely for the disease? a. Autosomal dominant b. Autosomal recessive c. X-linked recessive d. X-linked dominant e. None of the above Sofia has a recessive X-linked disease. What is the probability that her children will have the disease if her husband does not have the disease allele? a. 100% of sons and daughters b. 50% of sons and daughters c. 100% of sons and 0% of daughters d. 100% of sons and 50% of daughters e. 0% of sons and daughters Thank you I really appreciate your help(:
Do people that are autosomal recessive for a disease have parents that are both carriers for that disease?
Uniparental disomy is the phenomenon in which an individual inherits both chromosomes from the same parent. While rare, it does occur.Mitotic recombination, which is also rare, could also generate this result if it occurred early in development. The individual would probably be mosaic, with AA, Aa, and aa cells — but if the target organ for the phenotype was completely or largely of the homozygous recessive genotype (aa), then the phenotype might be visible.
Hi. I need help with this biology question. thanks for your help :)?
Since CF is autosomal recessive, then the parents are: Cfcf and Cfcf. So, their chance of having a child with cystic fibrosis is 25%. Here is the cross: Cfcf x Cfcf children: 25% CfCf (normal, non-carrier) 50% Cfcf (normal, carrier) 25% cfcf (cystic fibrosis) Please note that Cystic Fibrosis has many alleles (not just one as is assumed in the problem above) and if this is a real-life case, a genetic counselor should be consulted.
Need help bio question asap!?
PKU (Phenylketonuria) is an autosomal recessive disease, in which the synthesis of amino acid Tyrosine from Phenylalanine is blocked. As a result, an excess of Phenylalanine gets converted into phenylketones, which appear in the urine. In severe conditions it may also result in damage to the brain. The gene responsible for this is p, whereas the gene P is responsible for normal synthesis of Tyrosine. In a small population of Brazilian natives, the frequency of gene p, responsible for this disease, is 0.3. What must be the frequency of people who are heterozygous for this disease? ( p + q = 1, p2 + 2pq + q2 = 1) A. 0.56 B. 0.35 C. 0.42
I need help with biology please!!!?
I really need some help with these questions! 1.) With regards to autosomal recessive disorders, heterozygotes display the disorder. True or False 2.) With regards to X linked recessive disorders, more females are affected than males. True or False 3.) With regards to autosomal dominant disorders, two unaffected parents can have affected children. True or False 4.) Letters on homologous chromosomes stand for genes that control traits such as hair color. Capital letters represent __ alleles, while lowercase letters represent ___ alleles. dominant; recessive homologous; non-homologous recessive; dominant more informtion needed to answer this question 5.) Given that E=unattached earlobes and e=attached earlobes, what is the genotype of an individual who is heterozygous for earlobe attachement? unattached earlobe Ee Ef EE 6.) Gen that E=unattached earlobes and e=attached earlobes, which of the following best describes an individual that is homozygous recessive for this trait? attached earlobes; Ee attached earlobes; ee unattached earlobes; Ee unattached earlobes; EE 7.) Given that F=flat feet and f=arched feet. A mating between a heterozygous male and a heterozygous female would result in what gentotypic ration in their offspring? 3 flat feet: 1 arched feet 1ff: 2Ff: 1FF 3FF: 4 ff 1Ff: 3 FF 8.) A child has cystic fibrosis. What are the genotypes of all persons involved if neither one of the parents has cystic fibrosis? Remember, this is an autosomal recessive disorder?
What do lysosomes have to do with Gaucher's disease?
Gaucher's disease is infact a rare autosomal recessive inherited disorder which involves metabolic malfunction and is also a lysosomal storage disorder. In this a sphingolipid ( a type of lipid ) called as glucocerebroside gets accumulated in certain cells and organs in absence of its proper metabolism and recycling. Enzyme glucocerebrosidase is responsible for its metabolism.Now, as we know, lysosomes contain digestive enzymes, glucocerebrosidase being one of them. Its absence in lysosomes makes metabolism of sphingolipid( glucocerebroside in this case) dysfunctional. Hence this lysosomal storage disorder is also called as sphingolipidosis.Hope it helps…https://en.m.wikipedia.org/wiki/...