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In sweet pea plant R is the allele for red flowers and r is the allele for white flowers a. If an RR plant and an rr plant are crossed what will be the outcome of their offsprings?
Wiki User
∙ 13y ago
All of the offspring will be red, since each of the four offspring receive the dominant red allele (R). Therefore, the offspring will all have the genotype Rr and a phenotype of red.
Wiki User
∙ 13y ago
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How do dominant and recessive alleles affect pheno type?
An allele can effect the phenotype of an organism by its dominance or recessiveness. If two dominant alleles are crossed the offsprings will carry the dominant trait of the alleles. If a dominant allele is crossed with recessive allele the phenotype of the offsprings will be of that of the dominant allele. And if two recessive alleles are crossed the phenotype of their offsprings will carry the reccesive trait.
What does The presence of an allele for purple flowers will mask the presence of an allele for white flowers mean?
Gene responsible for purple color is dominant over white color.
You cross a pure-breeding plant with red flowers and a pure -breeding plant with white flowers. All the offspring have red white speckled flowers. what type of allele relationship does this show?
You cross a pure-breeding plant with red flowers and a pure-breeding plant with white flowers. All the offspring have red and white speckled flowers. What type of allele relationship does this show?
What are 2 possible end results of meiosis?
There could be 4 daughter cells with half the chromosomes as the original. Another outcome is crossing over in which one allele from one chromosome changes positions with an allele from another chromosome.
Two dominant alleles are expressed at the same time?
The alleles are not always both expressed.Take the simplest example, a case when there are only two alleles for a trait, R and r. When the organism is a heterozygote, meaning that it has both alleles with a genotype of Rr, only the phenotype carried by the dominant allele, the R, will be expressed. The dominant allele masks the phenotype of the recessive allele. A case in which only the dominant phenotype is expressed in a heterozygote is a case of complete dominance.*Cases where the dominant allele does not completely mask the recessive allele are cases of incomplete dominance and co-dominance.In incomplete dominance, the dominant allele has some effect on the recessive allele, but not a full effect. This results in a third phenotype in the population. Think red and white flowers leading to pink flowers.In co-dominance, the dominant allele has as much effect on the phenotype of the organism as the recessive allele. Think red and white flowers now leading to red and white streaked flowers.
How do dominant and recessive alleles affect pheno type?
An allele can effect the phenotype of an organism by its dominance or recessiveness. If two dominant alleles are crossed the offsprings will carry the dominant trait of the alleles. If a dominant allele is crossed with recessive allele the phenotype of the offsprings will be of that of the dominant allele. And if two recessive alleles are crossed the phenotype of their offsprings will carry the reccesive trait.
Is it possible for there to be recessive homozygous alleles?
Yes - recessive alleles can be eliminated from the gene pool. However, heterozygous individuals (those with one recessive allele) are harder to identify if the allele is recessive, so if talking about artificial (selective) breeding, the process may take some time.
When gregor mendel crossed a tall plant with a short plant the F1 plant inherited what?
one tall allele and one short allele
In the pea plants the presence of an allele for purple flowers will mask presence of an allele for white flowers. What does that mean?
Gene responsible for purple color is dominant over white color.
What does The presence of an allele for purple flowers will mask the presence of an allele for white flowers mean?
Gene responsible for purple color is dominant over white color.
In pea plants individuals that are Pp for the alleles that code for flower color will have purple flowers What is the phenotype?
Pp, where P represents the dominant allele and p represents the recessive allele.
You cross a pure-breeding plant with red flowers and a pure -breeding plant with white flowers. All the offspring have red white speckled flowers. what type of allele relationship does this show?
You cross a pure-breeding plant with red flowers and a pure-breeding plant with white flowers. All the offspring have red and white speckled flowers. What type of allele relationship does this show?
How does codominance change the offsprings phenotype?
Codominance is contrary to typical mendelian genetics, in that no one allele is dominant to the other, so they are both expressed equally. The important part is that the offspring with express each allele independently, such as having spots of one color, then spots of another color, instead of blending the two colors, which would be incomplete dominance. So codominance changes the offsprings phenotype by making the offspring express both alleles equally, yet each allele's expression is separate/distinguishable, not blended.
Explain the difference between intermediate inheritance and codominance?
In codominance, neither phenotype is recessive. Instead, the heterozygous individual expresses bothphenotypes. Intermediate inheritance is when neither allele is dominant to another, but a mixture is produced in the 2 alleles present. A mixed phenotype is given that is between the two parents phenotype .e.g Red flowers (RR) crossed with white flowers (WW) produces pink flowers (RW).
Which of these would you expect to have dark red flowers?
a flower homozygous for the red flower allele
When a mutated striped watermelon is crossed with a purebred green watermelon what is the recessive allele and the domonint allele?
depends i think... gnay gnay. you should look at other websites like... ooshta.org or even peoplelovers.gov
What is the genotype of a black guinea pig if it is crossed with a whites guinea pig and they have 4 offspring that are black and 2 offspring are white?
Assuming black allele exhibits complete dominance and the white allele is recessive, the genotype is Bb.
