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A test cross made with a cat that may be heterozygous for a recessive trait what is the presumed genotype of the cat explain?
Xoxocutegirl95
A test cross made for a heterozygous recessive trait would show a dominant gene and a recessive gene. The cat would have one dominant gene (A) and 1 recessive (a).
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Explain what is meant by homo zygote and heterozygous?
bobo
A male and female bison that are both heterozygous for normal skin pigmentation produce an albino offspring Which of Mendels principles explain why the offspring is albino?
Both parents would each have one dominant gene for normal pigmintation and each would have one recessive albino gene. Say P is the dominant gene and q is the albino gene. Then the parents genotype would both be Pq. Below is a Punnet Square. The child's genotype is qq P q ------------------------------------- P / PP / Pq (carrier) / / / / ///////////////////////////////////////// q / Pq (carrier) / qq (albino) / / / / ////////////////////////////////////////
Do you always kow what your genotype is -explain?
No. You only become aware of your genotype as it gets expressed. For example people with Huntington's Chorela only become aware of it as they enter their thirties.
Many inherited disorders of humans appear in children of parents who do not have the disorder how can you explain that the parents do not have the disorder but the child does?
The disorder is controlled by a recessive factor.
All the children had two heterozygous parents Use the law of independent assortment to explain why there were no identical twins produced?
identical twins could not be produced because there is only suppose to be 2 gametes which is one dominant and one recessive though there can´t be only one gamete i dont know if this answer makes sense but i dont know either if its right
Using the terms dominant recessive explain the difference between genotype and phenotype?
No, I think you have your terms confused.The terms "dominant" and "recessive" are applied to alleles of a genotype. A genotype is an expression (using upper- and lower-case letters) that shows what alleles an organism has for a particular locus. The two alleles (in most cases) inherited (one from mother and one from father) can either be dominant or recessive. The recessive allele is not fully expressed in the presence of the dominant allele and is only expressed when there are two recessive alleles. The genotype could be called "recessive" I suppose if the genotype is homozygous recessive. But remember that two recessive alleles as a genotype is only one possibility - in which case you can't say the "genotype is recessive".The phenotype is dependent on the genotype. If present, the dominant alleles (in simple Mendelian genetics) will determine the phenotype - what the organism's trait or characteristic is. The phenotype will never be what is coded by the recessive allele unless the genotype is two recessive alleles.
Cattle with both white hair and red hair are?
Mendel's principle of dominant and recessive alleles doe not explain why the heterozygous chickens have both red and white hair
In a genetic class pure green and yellow pod cross what would be the genotype of f1?
This is one of the classic experiments carried out by Gregor Mendel. If you cross pure-breeding green pod plants with pure-breeding yellow pod plants the offspring (F1 generation) will all have green pods. This means that green pod is dominant and yellow pod is recessive. To explain the results, pure-breeding green pod plants must have the genotype GG (homozygous dominant) and yellow pod plants must be gg (homozygous recessive). When they are crossed the F1 offspring will receive a G allele from the green parent and a g allele from the yellow parent, so they will all have the genotype Gg ie they will be heterozygous.
Could 2 people with a widows peak have a child with a straight hairline and could 2 people with a straight hairline have a child with a widows peak EXPLAIN?
Yes to the first one, no to the second one. Firstly, widow's peak is caused by a dominant gene while a straight hairline is caused by a recessive gene. Let 'H' be dominant and 'h' be recessive. So for a dominant gene, the trait still will be expressed whether the genotype of the person is homozygous dominant(HH) or heterozygous(Hh). For a recessive gene however, the trait will only be expressed when the genotype of the person is homozygous recessive (hh). So two people with a widow's peak CAN have a child with a stright hairline, provided both of their genotypes are Hh. This is because by crossing their genotypes, they can have a possibility of having child with the genotype HH(widow's peak), Hh(widow's peak), and also hh(straight hairline). The ratio of these three possibilities however, are 1:2:1. So the odds of having a child with a straight hairline in this case is 1:3. If the two people who have widow's peak have the genotype HH or one of them HH and the other Hh, then the possibility of having a child with a straight hairline is 0. This is because by crossing their genotypes together, the genotype of the child will either be HH for the first case, and HH or Hh for the second case. For two people who have a straight hairline, the genotype of both will definitely be homozygous recessive (hh), thus child will definitely have the recessive gene. Therefore, it is not possible for two people with straight hairline to have a child with widow's peak.
Explain what is meant by homo zygote and heterozygous?
bobo
How can you explain the fact that the offspring that has a BB genotype and one that has a Bb genotype are both black?
B is dominant.
A male and female bison that are both heterozygous for normal skin pigmentation produce an albino offspring Which of Mendels principles explain why the offspring is albino?
Both parents would each have one dominant gene for normal pigmintation and each would have one recessive albino gene. Say P is the dominant gene and q is the albino gene. Then the parents genotype would both be Pq. Below is a Punnet Square. The child's genotype is qq P q ------------------------------------- P / PP / Pq (carrier) / / / / ///////////////////////////////////////// q / Pq (carrier) / qq (albino) / / / / ////////////////////////////////////////
What alleles is the recessive alleles explain why?
it would be t recie
If a claimant has a genotype of Ww can they be a possible heir Explain why or why not?
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How do dominant and recessive genes work?
explain how dominant genes work
Do you always kow what your genotype is -explain?
No. You only become aware of your genotype as it gets expressed. For example people with Huntington's Chorela only become aware of it as they enter their thirties.
What color eyes will my son have if i have black eyes and she has blue?
The genetics of eye color are more complicated than previously thought. Color is determined by multiple genes. The genetics of eye color are so complex, that almost any parent-child combination of eye colors can occur.Eye color can, however, be represented by a simplified, albeit somewhatinaccuratemodel.That you have black eyes can mean one of three things: either you have a homozygous dominant gene for black eyes, a heterozygous dominant gene for black eyes, in which case you could have a recessive gene for another, unknown color, or you have a homozygous recessive gene for black eyes.That she [carrying your child] has blue eyes means one of three things: either she has homozygous dominant blue eyes, heterozygous dominant (which could mean another, recessive color), or homozygous recessive blue.For our model, I shall assign variables to each case as follows:Dominant black: NRecessive black: nDominant blue: ARecessive blue: aUnknown recessive: x, yHere are the possible permutations by this model for your offspring's eye color:NN + AA = NA + NA + NA + NA; 100% chance of codominant black-blue eye colorNn + AA = NA + nA + NA + nA; 50% chance for codominant black-blue, 50% chance for heterozygous blueNN + Aa = NA + NA + Na + Na; 50% chance for a codominant black-blue, 50% chance for heterozygous blacknn + AA = nA + nA + nA + nA; 100% chance of heterozygous blueNN + aa = Na + Na + Na + Na; 100% chance of heterozygous blackNx + AA = NA + xA + NA + xA; 50% chance of codominant black-blue, 50% of heterozygous blueNx + Aa = NA + xA + Na + xa; 25% chance of codominant black-blue, 25% chance of heterozygous blue, 25% chance of heterozygous black, 25% chance of ExceptionNx + aa = Na + xa + Na + xa; 50% chance of heterozygous black, 50% chance of ExceptionNx + Ax = NA + xA + Nx + xx; 25% chance of codominant black-blue, 25% chance heterozygous blue, 25% chance of heterozygous black, 25% chance of homozygous recessive unknown colorNx + Ay = NA + xA + Ny + xy; 25% chance of codominant black-blue, 25% chance of heterozygous blue, 25% chance of heterozygous black, 25% chance of ExceptionNN + Ax = NA + NA + Nx + Nx; 50% chance of codominant black-blue, 50% chance of heterozygous blackNn + Ax = NA +nA + Nx + nx; 25% chance of codominant black-blue, 25% chance of heterozygous blue, 25% chance of heterozygous black, 25% chance of Exceptionnn + Ax = nA + nA + nx + nx; 50% chance of heterozygous blue, 50% chance of ExceptionIt may be prudent that I explain some of the terminology: codominant is an instance in which two dominant genes are both expressed, and metaphorically butt heads. This may be expressed in varying ways, depending on the genes. My use of 'Exception' refers to instances in which the resultant color is dependent upon the color of the 'x' or 'y,' or instances in which color may depend on which recessive gene is more recessive than the other. For example, if the gene your offspring receives is nx, this could result in black eyes because 'x' was more recessive than 'n,' black eyes because 'x' was a recessive gene for black eyes as well, 'x' color eyes because 'n' was more recessive than 'x,' or codominant expression because the genes were equally recessive (this codominance may usually be expressed as hazel eyes, eyes that change from expressed black to expressed 'x' or vice-versa throughout the life, or eyes of a 'dark x' color).It really is difficult to predict the color of an offspring's eyes with no more than parent eye colors. It is reasonable to assume that your son will have either black or blue eyes, but there is no guarantee. Think of it as a lovely surprise.
