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When a plan inherits one allele for tall stems and one allele for short stems its alleles are written as what?
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∙ 12y ago
Tt
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∙ 12y ago
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How do dominant and recessive alleles affect an offsprings phenotype?
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.
Why are many harmful alleles recessive?
The reason many harmful alleles are recessive is because the harmful alleles that were dominant stopped the carrier from reproducing so the allele was not carried on. A dominant trait is expressed if present and would harm the carrier. A recessive trait however can remain in the genotype of an individual and not the phenotype so they will not be harmed by the trait but can pass it on to offspring. In short: dominant harmful alleles stopped the carriers from producing so the allele was not spread.
A species of fly has two alleles for the length of their legs. The allele for long legs is dominant and is represented by p. The allele for short legs is recessive and is represented by q. If 12 of 10?
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What is a heterozygous recessive?
Homogeneous recessive is two like genes that express a recessive trait.
How do you know if a gene is dominant or recessive?
A dominant allele expresses itself in every offspring in every generation. A dominant allele expresses itself irrespective of the other allele present along with it. A recessive allele, however is masked by the presence of dominant allele. It can express itself only if the other gene in the allele pair is also recessive. As a result, it is not expressed phenotypically in every generation.
How might a geneticist write the alleles to show that a tall pea plant has one alleles for tall stem and one alleles for short stems?
Having one allele for tall stems and one allele for short stems is a heterozygous genotype and could be represented as Tt, where T represents the tall allele, and t represents the short allele, if the tall allele has complete dominance over the short allele.
When a plant has two recessive alleles for short stems its alleles are written?
well it depends on the letters that you are given, recessive alleles are ALWAYS lower case.An example answer would be: ss, where s would represent the recessive allele.
How do dominant and recessive alleles affect an offsprings phenotype?
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.
How might a geneticist write the alleles to show that tall pea plant has one allele for tall stems and one allele for short stems?
Tt :)
What are the different forms of a gene called?
Alleles are the different forms of a gene.Alleles are corresponding pairs of genes located at specific positions in the chromosomes. Together, alleles determine the genotype. Alleles which determine some aspect of the phenotype, the physical appearance of an organism, are said to be coding alleles.When both alleles in a pair are the same, the alleles are homozygous. If the alleles are different, they are heterozygous. In the case of homozygous alleles, the expression of phenotype is usually very straightforward. In heterozygous instances, however, the phenotype of the organism is determined by which allele is dominant, meaning that one allele overrides the other.In the case of eye color in humans, if someone inherits a blue allele and a brown allele, his or her eyes will be brown, because brown is a dominant genetic trait, requiring only one allele for expression. However, if that person had a child with someone who also carried a blue allele and both parents passed the blue trait down, the child would have blue eyes. This explains why blue-eyed children sometimes randomly pop up in a brown-eyed family: because someone in the family's genetic history had blue eyes.
What is the difference between the Principle of Dominance and the Principle of Segregation?
These are principles which Gregor Mendel discovered when he carried out his experiments on inheritance in pea plants. Mendel discovered that each character eg height of the plant, is controlled by two genes (which he called 'factors'), one from each parent. The Law of Segregation states that when gametes (sex cells: eggs and sperm) are produced, the two genes in each pair separate (segregate) and go to different cells. This means that eggs and sperm end up with only one copy of each gene, instead of a pair of genes. Mendel also discovered that genes occurred in alternative versions which we call alleles eg the height gene can be the tall allele or the short allele. If an individual plant inherits one tall allele and one short allele, the tall allele 'hides' the short allele and the plant is tall. The tall allele is called the dominant allele. Dominant alleles only need to be inherited from one parent to produce an effect. The short allele is called the recessive allele. A recessive allele must be inherited from both parents in order to produce an effect.
Is it possible to have a child that is O blood group from a father with A blood group and mother B blood group?
The short answer is YES. To explain as simply as possible; Each of us inherits a set of genes from each parent, a set of alleles from each parent; in the case of blood type, the alleles that may be present at the site on the chromosome responsible for blood type may be either A,B, or O (O actually being the absence of A or B). In the above question, if one parent's alleles are A and O (remember, everyone has two alleles), their blood type is A; if the other parent's alleles are B and O, that parent types as B. If their child inherits the "O" allele from each parent, that child will be type O.
What is alleles for a tall pea plant?
If you mean one allele for short stems, then it would probably be something similar to Ss, where S is a tall stem allele and s is a short stem allele. The letters chosen to represent the alleles are not universally agreed on (there are far too many genes, let alone alleles, to name with only letters), so they are specified in each case by the geneticist. Also, make sure that the letters match each trait - s and S are the same letter for the same trait, the stems. For color, you would use another pair - say perhaps C for green peas, c for yellow peas, et cetera.
During the formation of gametes in a hybrid tall plantthe allele and the short allele stay together?
During the formation of gametes in a hybrid tall plant, the alleles for tall and short height do not stay together. They segregate and assort independently during meiosis, resulting in a random combination of alleles in the gametes. This allows for a variety of possible genetic combinations in the offspring.
Why are many harmful alleles recessive?
The reason many harmful alleles are recessive is because the harmful alleles that were dominant stopped the carrier from reproducing so the allele was not carried on. A dominant trait is expressed if present and would harm the carrier. A recessive trait however can remain in the genotype of an individual and not the phenotype so they will not be harmed by the trait but can pass it on to offspring. In short: dominant harmful alleles stopped the carriers from producing so the allele was not spread.
Compare and contrast dominant and recessive?
In genetics, each organism will typically have 2 alleles for each trait. For a trait such as hair color, you might have an allele for red hair from your dad and an allele for brown hair from your mom. The trait for brown hair happens to be dominant to the trait for red hair so you would show the allele for brown hair. (In other words, you would have brown hair.)
A species of fly has two alleles for the length of their legs. The allele for long legs is dominant and is represented by p. The allele for short legs is recessive and is represented by q. If 12 of 10?
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