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How is probability related to genetics?
Probability and genetics go hand in hand. Mendel in his charts showed the probability of dominant and recessive genes being passed on to offspring. The desired trait could be cultivated knowing the probability of inheritance.
What is the probability of a homozygous recessive offspring?
It depends. If it's a heterozygous cross, (Tt x Tt), there's a 25% chance. If it's a homozygous dominant cross (TT x TT), the chance is 0%. Neither parent has the alleles for a recessive trait, so none of their offspring can have the recessive trait. If it's a homozygous recessive cross (tt x tt), there's a 100% chance. The only alleles the parents can pass on are recessive.
What is used to determine the probability of a trait?
the punnett square
What is the probability that an offspring will be homozygous recessive?
well, it depends on the genes of the parents
What is the probability that each child born to two carriers of a recessive disorder allele will have the disorder?
The child will have the disorder, only if the recessive allele from both the parents is transferred to the child. Therefore, the probability is 1/4.
All individuals that show a recessive trait are?
homozygous for that trait, meaning they have two copies of the recessive allele.
What is a trait that will appear in yhe offspring if one of the parents contributes it?
In order for a recessive trait to appear in the offspring, it must inherit a recessive allele for that trait from both parents.
The allele for the trait that does not appear in a heterozygous individual is?
recessive
Will an offspring show a recessive trait if only one of its parent has the gene for that trait?
A family tree is a great idea, but the science is based on probability. The probability that a recessive trait will show up in a family is 25% if both parents are carriers. In order for a recessive trait to show up in a person, he/she must inherit a copy of the recessive trait from both parents. If one parent is recessive, let's say "rr" and the other parent is a carrier, say "Rr", the probability is 50%. If both parents are recessive, the probability is 100% (rr x rr). If neither parent carries the trait the probability is 0% (RR x RR). BUT, this only tells you what MIGHT happen. We all know that the probability of having a boy is 50:50, but we all know families of all boys. So it would be interesting to see if the probability works out in your family. If you do a search on the web for "genetics" or "probability and genetics" you will get plenty of hits. vanhoeck
A trait that is hidden?
The trait that is hidden is recessive trait.
What are the ratios of a heterozygous dihybrid cross and what is the probability of having the recessive trait show?
9:3:3:1 The probability of having both recessive traits is 1:16.
Is trait which will not appear unless two genes for it arew present?
recessive
Why is it possible that a majority of people may display a recessive trait?
A recessive trait can be masked by a dominant trait in individuals who are heterozygous. Thus, a majority of people may appear to display the dominant trait even if they are carriers of the recessive trait. Only when two carriers of the recessive trait have children together is there a chance for the recessive trait to become visible in the offspring.
In which offspring does a dominant trait appear?
A dominant trait will appear in offspring that inherits at least one copy of the dominant allele from either parent. If an individual has two different alleles for a trait (one dominant and one recessive), the dominant trait will be expressed.
What is trait called that appear only when both alleles are present?
A trait that appears only when both alleles are present is called a recessive trait. In this case, the trait is masked when the dominant allele is present, but becomes visible when two copies of the recessive allele are inherited.
What is the probability Two individuals with autosomal recessive trait will have a child with the same trait?
If they are expressing the trait, 100%, as their genotypes would be, rr X rr If they both carry the trait and it is dominated, Rr X Rr, then the probability would be, 25% of their child expressing the trait.
What is the difference between a dominant trait and a recessive trait?
A dominate trait will most likely take over the recessive.
