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Recessive phenotypes are rare because they require two copies of the recessive allele to be expressed, which means both parents must carry the allele for the phenotype to be observed in offspring. If the allele is rare in the population, the likelihood of two carriers mating is low. Additionally, dominant alleles often overshadow recessive ones, leading to greater expression of dominant traits. As a result, recessive traits persist at lower frequencies in the gene pool.
What else can I help you with?
What genotype must the person have who possessed the recessive phenotypes?
The genotype is homozygous recessive or the recessive trait is on the X chromosome and has no corresponding allele on the Y chromosome.
How differences in genotypes cause variations in phenotypes?
Phenotypes are the traits expressed by the genotype. So, for blood type, a person can have A and i alleles (genotype). However, in the phenotype, since i is recessive, only the A will be expressed, and the person will have an A blood type.
How many phenotypes can come from a heterozygous parent and a homozygous recessive parent?
Two types: A heterozygous parent (Aa) and a homoygous recessive parent (aa) can produce phenotypically dominate and phenotpically recessive offspring (with 50% genotypes Aa and the other 50% aa). If the genes are co-dominate then the offspring can have blended traits and recessive traits phenotypically.
Why phenotypes don't always express its entire genotype?
Phenotypes are the entirety of the observable traits. Genotypes are the instructions in the genetic code. Dominant alleles override the recessive alleles, making only the dominant alleles expressed.
Which genetic concepts best explain the fact that hybrid parents can produce offspring with recessive phenotypes?
The concept of recessive alleles and the principle of segregation during gamete formation can explain how hybrid parents carrying a recessive allele can produce offspring with recessive phenotypes. When the alleles for a specific trait segregate during gamete formation, a recessive allele from each parent can combine in the offspring, resulting in the expression of the recessive phenotype.
What genotype must the person have who possessed the recessive phenotypes?
The genotype is homozygous recessive or the recessive trait is on the X chromosome and has no corresponding allele on the Y chromosome.
How differences in genotypes cause variations in phenotypes?
Phenotypes are the traits expressed by the genotype. So, for blood type, a person can have A and i alleles (genotype). However, in the phenotype, since i is recessive, only the A will be expressed, and the person will have an A blood type.
What was the ratio of dominance to recessive phenotypes in the F2 generation of Mendel's experiments?
3:1
How many phenotypes can come from a heterozygous parent and a homozygous recessive parent?
Two types: A heterozygous parent (Aa) and a homoygous recessive parent (aa) can produce phenotypically dominate and phenotpically recessive offspring (with 50% genotypes Aa and the other 50% aa). If the genes are co-dominate then the offspring can have blended traits and recessive traits phenotypically.
Why phenotypes don't always express its entire genotype?
Phenotypes are the entirety of the observable traits. Genotypes are the instructions in the genetic code. Dominant alleles override the recessive alleles, making only the dominant alleles expressed.
The outward appearance of a particular trait is called?
The outward expression of genetic traits are called phenotypes. Phenotypes expression include recessive and dominant genes such as eye and hair color.
Which genetic concepts best explain the fact that hybrid parents can produce offspring with recessive phenotypes?
The concept of recessive alleles and the principle of segregation during gamete formation can explain how hybrid parents carrying a recessive allele can produce offspring with recessive phenotypes. When the alleles for a specific trait segregate during gamete formation, a recessive allele from each parent can combine in the offspring, resulting in the expression of the recessive phenotype.
What was the ratio of dominant to recessive phenotypes in the F2 generation of Mendel's experiments?
(Apex Learning) 3:1.
How do you deterime phenotypes?
phenotypes are decided by the alleles for that particular characteristic, by a dominant or two recessive alleles. For example, cystic fibrosis has a recessive allele so the phenotype of cystic fibrosis would only appear if there were two of the recessive allele, one from each parent, were present. A heterozygous carrier of the cystic fibrosis allele would show the phenotype of not having cystic fibrosis. So to determine the phenotype simply find out which allele is dominant and find what alleles each parent has the the probability of each phenotype can be calculated
The following seed phenotype a showed up in a generation of plants. Which alleles are recessive?
To determine which alleles are recessive in the seed phenotype, you would need to compare the phenotype of the plants with known dominant phenotypes. Typically, if a phenotype appears in a generation that resembles the parents but differs from the dominant traits, those traits associated with the appearance of phenotype "a" are likely recessive. Observing the inheritance patterns in subsequent generations can further clarify which alleles are recessive based on the phenotypes that re-emerge when homozygous recessive individuals are bred.
What is the pedigree of a rare recessive phonotypr determined by a recessive allele?
this question makes no sense.
The second generation phenotypes resulting from the cross of true-breeding monohybrid pollination will display a ratio of?
3:1 ratio of dominant to recessive phenotypes.
