Genetics Quizzes Online & Trivia

Wheres the explanation? I have no idea why this is the answer. Her mom didn't display the trait, but she had it in her, so there is a 1/2 chance that she has the recessive trait. And if she does, her husband would not be able to have the trait even as a recessive trait because he is male, so the daughter can't have the trait. But if he passed on a Y chromosome, and the mom has a 1 in 2 chance of having the trait, then that means there is a 1 in 2 chance of passing on that recessive trait to their sons which would be displayed. so you would multiply 1/2 times 1/2 to get 1/4? oh wait that might be the explanation.

Use a pundit square. They kindly give the mode of inheritance as X-linked recessive. Both sons are affected. Daughter unaffected. Father unaffected. Mother unaffected. Therefore, mother must be aA and father A. Sons are aY, daughter is either Aa but could equally be AA. This is a 50% chance for her. Carrying that forward her unaffected partner is AY. There is no chance the girls will be affected, but there's a 50% chance that they will also be carriers. There is a 50% chance the sons will be affected if the mother is Aa. If the mother is AA then the recessive trait is lost in that line. Therefore, 50% x 50% gives 25% for sons and 0% chance for daughters.If the sons choose to have children, depending on their partner trait status, their girls will be carriers or affected, and the sons will be unaffected (if no recessive gene carried) or affected 50% if heterozygous or 100% affected if homozygous recessive.

The quiz answer is wrong. The correct answer is 50% for a son 0% for a daughter. As the mother has affected sons there is 100% chance that she is a carrier.

Let's go through a short vocabulary lesson about Mendelian GeneticsHomozygous-sameHeterozygous-differentGenotype- Genes being expressed ( letters)Recesssive- A trait that can be masked by another ( lowercase letters)Allele- an alternate form of a geneNumbers 1&3 Do not follow the rules of incomplete RRXWW ( Two dominant alleles no ressive, blended) nor complete dominance ex. GGxgg2&4 are heterozygous TtThe question needs to be reevaluated.Thank youAP Biology

1/2. Heterozygousorganisms for the trait can produce half the gametes with recessive and the other half with dominant alleles.

Isn't theanswer for the question:3'-ACCGTTACC-5'suppose to be TGGCAATGG

50% for a son, zero for a daughter. II3 is clearly heterozygous. Therefore, there is a 50/50 chance that a son will have hemophilia. If we know nothing about II3 except that hemophilia is in siblings, then it is 25% for sons.

Ram is married to his uncle’s daughter Geeta and their daughter Reema was bornwith alkaptonuria aninherited metabolic disorder. Ram and Geetha are however normal, but one oftheir grand parents had the same disease. The couple are planning to have their second child.What is the probability of their next child being born with alkaptonuria?a) 0b)1/4c)1/12d)1/16

I don't understand how to use Bayes' formula to figure this out. Could anyone show me step by step?

There are 23chromosomes in the body not 46 because there are 46 chromosomes in the body nub

The answer to this question is letter A. If you are not familiar with Albinism, this is a type hereditary disorder that is often related to hypopigmentation. One of the most common forms of Albinism is OCA or Oculocutaneous Albinism. This type of albinism occurs because of the autosomal recessive trait which explains why A is the right answer. Those who have this condition will showcase the signs and symptoms through the appearance of the eyes, the hair follicles, and the skin. Usually, the skin shows a deficiency in melanin. Those who have albino usually have light-colored skin and hair as compared to the rest of their family members who do not have the same traits.

The correct answer to this question is A, 1 in 4 for a son, close to zero for a daughter. This question includes a diagram, and the diagram is a pedigree. Pedigrees help show a relationship between an organism and the generations that came before the current organism. Many types of organisms benefit from pedigrees, including humans and dogs. The diagram is easy to use and includes all kinds of important family information. Pedigrees include symbols that all represent something. The circles in the diagram represent females, and the squares represent males. Roman Numerals represent the generations.