Two different alleles at a locus are responsible for different phenotypes, and both alleles affect the phenotype of the heterozygote. … Both the A and B alleles contribute to the phenotype of the heterozygote. Thus the alleles A and B are said to be co-dominant.
What determines phenotype?
An organism’s phenotype is determined by its genotype, which is the set of genes the organism carries, as well as by environmental influences upon these genes. … Phenotypes also include observable characteristics that can be measured in the laboratory, such as levels of hormones or blood cells.
What is the phenotype of a heterozygous genotype?
An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. … Of these three genotypes, only bb, the homozygous recessive genotype, will produce a phenotype of blue eyes.
How do you know if a phenotype is homozygous or heterozygous?
If the test cross results in any recessive offspring, then the parent organism is heterozygous for the allele in question. If the test cross results in only phenotypically dominant offspring, then the parent organism is homozygous dominant for the allele in question.
What allele determines the phenotype?
Alleles contribute to the organism’s phenotype, which is the outward appearance of the organism. Some alleles are dominant or recessive. When an organism is heterozygous at a specific locus and carries one dominant and one recessive allele, the organism will express the dominant phenotype.
How does the phenotype depend on its genes?
An organism’s genotype is the set of genes that it carries. An organism’s phenotype is all of its observable characteristics — which are influenced both by its genotype and by the environment. For example, differences in the genotypes can produce different phenotypes. …
How do genotype determine phenotype?
Genotype & Phenotype. Definitions: phenotype is the constellation of observable traits; genotype is the genetic endowment of the individual. Phenotype = genotype + development (in a given environment). … In a narrow “genetic” sense, the genotype defines the phenotype.
Can a person’s genotype be determined by their phenotype?
No, a person’s genotype cannot be determined solely by their phenotype as many genes in our genome do not get expressed.
How would you differentiate among genotype and phenotype is?
The genotype is a set of genes in the DNA which are responsible for the unique trait or characteristics. Whereas the phenotype is the physical appearance or characteristic of the organism. Thus, we can find the human genetic code with the help of their genotype.
What is the phenotype of a heterozygous plant?
Heterozygous means that an organism has two different alleles of a gene. For example, pea plants can have red flowers and either be homozygous dominant (red-red), or heterozygous (red-white). If they have white flowers, then they are homozygous recessive (white-white). Carriers are always heterozygous.
What is H * * * * * * * * * and heterozygous in genetics?
Homozygous: You inherit the same version of the gene from each parent, so you have two matching genes. Heterozygous: You inherit a different version of a gene from each parent.
How do you determine if a plant is homozygous or heterozygous?
Homozygous plants have two identical copies of a single gene. Heterozygous plants have two copies of a single gene, but those copies are alleles, or different versions of that gene.
What determines or contributes to your phenotype quizlet?
your genotype is what makes your phenotype. your base sequence of a gene is what determines your allele- dominant or recessive, your two alleles determine ypur genotype, your genotype determines your phenotype. an organism’s genotype determines theor phenotype, because the genotype has the genes.
Does environment affect the phenotype?
Environment Can Impact Phenotype
Environmental factors such as diet, temperature, oxygen levels, humidity, light cycles, and the presence of mutagens can all impact which of an animal’s genes are expressed, which ultimately affects the animal’s phenotype.
What determines the number of phenotypes for a given trait?
Explain what determines the number of phenotypes for a given trait. The number of phenotypes produced for a given trait depends on how many genes control the trait. … Evolution can be defined as a change in the relative frequency of alleles in the gene pool of a population.