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What did Mendel mean by a dominant factor?
Mendel meant that a dominant factor is a gene that expresses its trait in an individual when present with the corresponding recessive gene. The dominant allele masks the expression of the recessive allele in a heterozygous individual.
Is it possible for an O positive mother and an O negative father to have an A negative daughter?
Type 'O' blood is a recessive factor, which means that it can't be hiding anymore recessive factors hiding so no its not impossible.
How does circumstance in which your pheonotype would show a recssive trait?
A phenotype will express a recessive trait when an individual has two copies of the recessive allele (homozygous recessive) and no dominant allele to mask its expression. This occurs when both parents contribute a recessive allele, which can happen if both are carriers of the recessive trait or express the trait themselves. Environmental factors can also play a role in the expression of certain traits, but for genetic recessiveness, the key factor is the allele combination inherited from the parents.
Is an x-linked recessive bleeding disorder caused by a missing coagulation factor?
Yes, the disorder you are referring to is hemophilia A, which is caused by a deficiency or missing factor VIII in the blood. This results in impaired blood clotting and leads to prolonged bleeding after injury or surgery. It is inherited in an X-linked recessive pattern, meaning it predominantly affects males.
What ratio would you expect in a two factor cross if both parents are heterozygous?
In a two-factor cross where both parents are heterozygous for two traits (e.g., AaBb x AaBb), you would expect a phenotypic ratio of 9:3:3:1 in the offspring. This ratio represents the combinations of the dominant and recessive traits for both factors. The 9 represents the offspring with both dominant traits, while the 3s represent the combinations with one dominant and one recessive trait, and the 1 represents the offspring with both recessive traits.
A factor that seems to disappear?
a recessive allele
What did Mendel mean by a dominant factor?
Mendel meant that a dominant factor is a gene that expresses its trait in an individual when present with the corresponding recessive gene. The dominant allele masks the expression of the recessive allele in a heterozygous individual.
Can a baby be born with positive blood if both parents are negative?
No. If both parents are Rh negative, they are homozygous recessive for the Rh factor and can only pass on recessive alleles to their children, and a positive Rh factor is a dominant trait.
Principle states that one factor in a pair may prevent the other factor in the pair from being expressed?
This principle is called the principle of dominance. It explains that in a pair of alleles, the dominant allele will be expressed over the recessive allele. So, the dominant factor will prevent the recessive factor from being expressed in the phenotype.
What is a dominant and ressesive?
In genetics, a dominant trait is one that is expressed when only one copy of the gene is present, masking the recessive trait. A recessive trait is only expressed when two copies of the gene are present.
A genetic factor that covers up another genetic factor is called?
A dominant trait is a genetic factor that blocks another genetic factor. A recessive trait is a genetic factor that is blocked by the presence of a dominant fact
Why does an organism have one factor for a dominant trait and one factor for a recessive trait?
Organisms have two factors (alleles) for a trait because they inherit one from each parent. Dominant traits are expressed when at least one dominant allele is present, while recessive traits are only expressed when both alleles are recessive. This is known as Mendelian inheritance.
Can 2 parents with positive blood have an A- child?
Yes, if both carry the rH neg factor as a recessive.
Is it possible for an O positive mother and an O negative father to have an A negative daughter?
Type 'O' blood is a recessive factor, which means that it can't be hiding anymore recessive factors hiding so no its not impossible.
What is an individual who has inherited a factor for a trait?
An individual who has inherited a factor for a trait is a carrier of that trait. They may or may not exhibit the trait themselves, as it depends on whether the inherited factor is dominant or recessive.
Can mother have a neg and father have o positive have a child with o ne blood?
Yes. The father could be carrying a recessive gene for a negative Rh factor. Obviously, the mother carries only the recessive genes.
If the mother's blood type is b plus and the father is o plus how come the baby had a o- blood type?
The mother must be b (with a recessive o) The rh factor + (with a recessive -) The father O with a recessive O, the rh factor - (with a recessive-) Children could be b+,b-,o+,o- Positive rh people can have both positive and negative children if one of them is carrying the negative gene. However, negative parents can have only negative children, because the dominate gene for rh is not present.
