What percentage of the population is heterozygous?
Since p = 1 – 0.3, then p must equal 0.7. 2pq = 2 (0.7 x 0.3) = 0.42 = 42% of the population are heterozygotes (carriers).
What percent of the population are heterozygous carriers of the recessive PKU allele?
Approximately 2%
What is the frequency of the genotype of the individuals in the population born with PKU?
They have a genotype of Aa and are represented by the 2pq term in the H-W equilibrium equations. or 32%. 12. In the United States, approximately one child in 10,000 is born with PKU (phenylketonuria), a syndrome that affects individuals homozygous for the recessive allele (aa).
How many would you expect to be homozygous for having red eyes?
Terms in this set (7) expect to be homozygous for red eye color? 4. The homozygous dominant frequency = p2 = (0.4)(0.4) = 0.16.
What percent of the offspring will be normal colored with blue eyes?
25%
Can two brown eyed parents have a blue eyed child?
Two brown-eyed parents (if both are heterozygous) can have a blue-eyed baby. However, since eye color is polygenic, several other genes exert their effects as well. So yes, while it’s unusual, it is very possible for blue-eyed parents to have a brown-eyed child!
What is the genotype of a brown eyed woman who has a blue eyed child?
If B is the allele for brown eyes and b is blue, the genotype of the blue-eyed man is bb. His wife must be a Bb heterozygote–she must have a B allele (she has brown eyes), but she must also have inherited a b allele from her blue-eyed mother (whose genotype was bb)….
| R | B | |
|---|---|---|
| W | RW (red) | BW (blue) |
What cross will create the most pink plants?
Incomplete dominance will produce the most pink flowered plants. Explanation: Incomplete dominance means when an allele from two homozygous parents combine in the offspring.
What is the probability of producing a pink flower?
The genotype for the pink flower is RW, and the genotype for the white flower is WW. This would lead to a 50 percent chance of the offspring having a phenotype of pink.
What would be the result if black chicken and a white chicken are crossed?
On mating a black chicken with white chicken, the offsprings will inherit B allele from black parent and W allele from white parent. The genotype of offsprings will be BW.
What is the genotype of black chickens?
In some chickens, the gene for feather color is controlled by codominance. The allele for black is B and the allele for white is W. The heterozygous phenotype is known as erminette.
What are the chances that a cross between a black chicken and white chicken will result in blue offspring?
This is because Back and white are both incomplete dominant traits. When you cross these together, all (100%) of the offspring will be heterozygous blue.
What offspring would you predict from the mating of a gray rooster and a black hen?
What phenotypes would you expect in the offspring of a cross between a gray rooster and a black hen? The black and white alleles are incomplete dominance, with heterozygotes being gray in color. A cross between a gray rooster and a black hen should yield approximately equal numbers of gray and black offspring.
Is Black genotype or phenotype?
The appearance of an animal (or any other form of life) is considered its phenotype (think ph = physical). An animal’s genotype is its genetic make-up (think gen = genetic). Black is the phenotype of a calf with at least one black (B) allele. Red is the phenotype of a calf with two red (bb) alleles.
Why can’t we tell a person’s phenotype from his her genotype?
You can’t tell a person’s phenotype from his/her genotype because some alleles may be sex-linked or co-dominant, and this won’t show in the phenotype of an organism.
Are blue eyes homozygous or heterozygous?
Of these three genotypes, only bb, the homozygous recessive genotype, will produce a phenotype of blue eyes. The heterozygous genotype and the homozygous dominant genotype both will produce brown eyes, though only the heterozygous genotype can pass on the gene for blue eyes.
What is a simple definition of phenotype?
A phenotype is an individual’s observable traits, such as height, eye color, and blood type. The genetic contribution to the phenotype is called the genotype.
What are some characteristics of phenotype?
Phenotype, all the observable characteristics of an organism that result from the interaction of its genotype (total genetic inheritance) with the environment. Examples of observable characteristics include behaviour, biochemical properties, colour, shape, and size.
Is AA compatible with AS?
Compatible genotypes for marriage are: AA marries an AS. You’ll end up with kids with AA and AS which is good. But sometimes if you’re not lucky all the kids will be AS which limits their choice of partner. AS and AS should not marry, there is every chance of having a child with SS.
What is the difference between a genotype and a phenotype?
A genotype refers to the genetic characteristics of an organism. A phenotype refers to the physical characteristics.
What kind of letter is used to represent a dominant allele?
A capital letter represents the dominant form of a gene (allele) and a lowercase letter is the abbreviation for the recessive form of the gene (allele).
Why do genotypes have 2 letters?
genotype = the genes of an organism; for one specific trait we use two letters to represent the genotype. A capital letter represents the dominant form of a gene (allele), and a lowercase letter is the abbreviation for the recessive form of the gene (allele).
What does F stand for in genotypes?
the offspring