If both parents carry the trait then there is a only a 25 percent chance the pregnancy will abort but there is a 75 percent chance the child will carry the trait and that can cause abnormalities during the pregnancy and afterwards.
A dominant alle masks the expression of the recessive trait in a heterozygous genotype, a recessive allele is the phenotpye expressed is the recessive trait.
a dominant allele is basically the one stronger, more powerful. unlike the recessive allele, i.e if two people wanted to calculate the probability of them having a baby with brown eyes, theyd have to look at their alleles, if the father had brown eyes, XX (to show how brown eyes are stronger) and the mother had hazel eyes (xx) their chid is going to have (Xx) which in this case, the child will have brown eys, because X is more dominant(strong) than x (recessive)
Both. A genotype is the scientific part, the lettering. For example; Lets say the mother's face shape, being recessive, is represented by lower case (s), and the father's, being dominate, is represented by captial (S). So the genotype for this sidtuation is Ss The phenotype is the physical appearance of the trait.
The traits inherited depends upon the alleles that have been passed on from the father and mother.The traits that are exhibited is called as the phenotype. Dominant allele needs only one copy to be expressed.For example in a pea plant "T" represents the tall dominant allele and "t" the short recessive allele .TT - when there are two dominant alleles the pea plant will express the tall trait. The pea plant is tall.Tt - when there is one dominant and one recessive allele the pea plant will still express the tall trait.In this case the dominant allele masks the recessive allele and the pea plant is still tall.tt - when there are two recessive alleles the pea plant will express the recessive trait and the pea plant is short.For a recessive trait to show up there should be a pair of recessive alleles.
A recessive trait shows up when there is no dominant trait to mask it. For example, say the allele for brown hair is B and for red hair is b. If the father contributes an allele for brown hair and the mother contributes and allele for red hair, the child's phenotype would be Bb and it would have brown hair. However if both parents contributed an allele for red hair, the child's phenotype would be bb and it would have red hair. You can do the same thing for eye color. Say the allele for green eyes is G and the allele for blue eyes is g (I don't know if this is actually correct, but it's just an example). If the father gives the allele for green eyes, G, and the mother gives the allele for blue eyes, g, the child's phenotype is Gg and it has green eyes. However, if both parents contribute alleles for blue eyes, then the child's phenotype is gg and it has blue eyes.
There is no possibility that a male will inherit and X-linked recessive allele from his father because for a male child the father only contributes the Y chromosome to his son (of the XY pair he has). If the fater's X chromosome has a recessive allele then it is 100% certain that he will pas this on to all his daughters.
This depends entirely on the genotype of the parents. The probability of getting a specific genotype is the probability of getting the correct allele from mother (1/2) multiplied by the probability of getting the correct allele from father (1/2) multiplied by the number of ways this can occur. The probability of getting a phenotype, if the phenotype is dominant, is the sum of the probability of getting two dominant alleles, and the probability of getting one dominant allele. If the phenotype is recessive, the probability is equal to the probability of getting two recessive alleles.
I assume you mean the mother has a dominant allele for some other color. Father is homozygous recessive for blue. Dominant allele + recessive blue X recessive blue + recessive blue The baby has a 50% chance of blue eyes and a 50% chance of getting the dominant colored eyes.
50%
A dominant alle masks the expression of the recessive trait in a heterozygous genotype, a recessive allele is the phenotpye expressed is the recessive trait.
Reading a punnet square is much like reading a grid map. Start with one finger on the father allele and one on the mother allele and find where they meet in the middle, the combination of both the father allele and the mother allele will give you the genotype. Repeat for all four middle squares. In all punnet squares, the dominate gene is the capital letter (e.g R) and the recessive gene is the normal letter (e.g r). When two dominate alleles show (RR) the phenotype will show the dominate gene. When one dominate and one recessive allele show the dominate gene will still show (Rr), in females they call it them a carrier female because they carry the recessive allele as well. When two recessive alleles show (rr) the recessive feature will show in the phenotype.
First of all alleles code for different traits all across an organism. Simply looking at it, a dominant allele is a trait that essentially "dominates" or is expressed over a recessive allele. In theory every organism (that is not asexual) receives one allele from its father and one allele from its mother. If both of these alleles are dominant (homozygous dominant) than the dominant trait is expressed, if one is dominant and one is recessive (heterozygous) than still the dominant trait is expressed. However, if the alleles for both traits are recessive (homozygous recessive) than the recessive trait will be expressed.
a dominant allele is basically the one stronger, more powerful. unlike the recessive allele, i.e if two people wanted to calculate the probability of them having a baby with brown eyes, theyd have to look at their alleles, if the father had brown eyes, XX (to show how brown eyes are stronger) and the mother had hazel eyes (xx) their chid is going to have (Xx) which in this case, the child will have brown eys, because X is more dominant(strong) than x (recessive)
Both. A genotype is the scientific part, the lettering. For example; Lets say the mother's face shape, being recessive, is represented by lower case (s), and the father's, being dominate, is represented by captial (S). So the genotype for this sidtuation is Ss The phenotype is the physical appearance of the trait.
a dominant allele is basically the one stronger, more powerful. unlike the recessive allele, i.e if two people wanted to calculate the probability of them having a baby with brown eyes, theyd have to look at their alleles, if the father had brown eyes, XX (to show how brown eyes are stronger) and the mother had hazel eyes (xx) their chid is going to have (Xx) which in this case, the child will have brown eys, because X is more dominant(strong) than x (recessive)
here is an example: key: dark hair - H (dominant) light hair - h (recessive) father: Hh mother: hh father's alleles: H & h mother's alleles: all h punnet square: father's __H____l____h_____ Mothers: h l Hh l hh The father's dominant H allele combines with the mother's h allele produces Hh The father's reccesive h allele combins with the mother's h allele produces hh therefore the possible combinations of alleles are Hh and hh. 1/2 of their children will have dark hair and 1/2 of their children will have light hair
Yes.