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Which is one example of a phenotypic change that is not genetic?
Humanns are larger than they were 100 years ago.
What is one example of phenotype change that is not genetic?
Humanns are larger than they were 100 years ago.
How can one determine the phenotypic ratio in a genetic cross?
To determine the phenotypic ratio in a genetic cross, you can use Punnett squares to predict the possible outcomes based on the genotypes of the parents. By analyzing the combinations of alleles passed down from each parent, you can calculate the ratio of different observable traits or characteristics in the offspring.
What is one example of a phenotyic change that is not genetic?
Humans are larger than they were 100 years ago =)weeeee!!!!!!!!!!!!
Which example of genetic variation is a variant of a gene?
One example of genetic variation that is a variant of a gene is a single nucleotide polymorphism (SNP), which is a change in a single DNA building block within a gene.
What does heteroztgous mean?
Heterozygous refers to an organism that has two different alleles for a specific gene, one inherited from each parent. For example, if one parent contributes an allele for brown eyes and the other contributes an allele for blue eyes, the offspring would be heterozygous for that trait. This genetic variation can lead to different phenotypic expressions compared to homozygous individuals, who have identical alleles for that gene. Heterozygosity is important for genetic diversity within a population.
What is a monohybrid ratio?
A monohybrid ratio refers to the genotypic and phenotypic ratio seen in the offspring of a genetic cross involving only one trait. For example, in a monohybrid cross between two heterozygous individuals (Aa x Aa), the genotypic ratio among the offspring would be 1:2:1 for AA:Aa:aa, and the phenotypic ratio would be 3:1 for the dominant trait to the recessive trait.
What is a genetic factor that blocks another genetic factor?
A genetic factor that blocks another genetic factor is known as an "epistatic" gene. In this interaction, one gene (the epistatic gene) can suppress or mask the expression of another gene (the hypostatic gene), leading to variations in phenotypic traits. This phenomenon is essential in understanding complex traits and inheritance patterns, as it illustrates how multiple genes can interact to influence observable characteristics. For example, in some plant species, the presence of a dominant epistatic allele can prevent the expression of another allele responsible for flower color.
Why does the expected genotypic ratio differ from the expected phenotypic ratio?
The expected genotypic ratio differs from the expected phenotypic ratio because genotypes represent the actual genetic combinations (e.g., homozygous dominant, heterozygous, homozygous recessive), while phenotypes reflect the observable traits resulting from those genotypes. In cases where one allele is dominant over another, multiple genotypes can lead to the same phenotype. For example, in a monohybrid cross, the expected genotypic ratio might be 1:2:1 for the alleles, while the phenotypic ratio could be 3:1, as both homozygous dominant and heterozygous individuals display the same dominant phenotype.
Is a gene that has multiple phenotypic effects a property call pleiotropy?
Yes, pleiotropy refers to a situation where a single gene influences multiple phenotypic traits. This means that one gene can have various effects on an organism's characteristics, which can complicate the understanding of genetic inheritance and expression. Pleiotropic effects are often observed in genes that play crucial roles in development or metabolic pathways.
What is a change in the frequency of a particular gene in one direction in a population called?
A change in the frequency of a particular gene in one direction in a population is called genetic drift. Genetic drift refers to the random fluctuation of allele frequencies in a population over time, leading to a change in the genetic composition of the population.
People with one sickle cell are not likely to get malaria what is this an example of?
Genetic drift
