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Genetics often involves dominant and recessive alleles. For instance, blue eyes are recessive and brown eyes are dominant.1 Each parent contributes one allele. If you get two blues, then your eyes are blue. If you get one or two browns, then you eyes are brown. That means that, given a random contribution from your parents, you have a 25% probability of blue eyes.
It also means that, even though you have brown eyes, you could be carrying the blue allele, and two parents with brown eyes could have a blue eyed child.
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1Its more complicated than that, since eye color is actually polygenic, involving more than one allele. This example was simplified to answer the question.
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How are the principles of probability used to predict the outcomes of genetic crosses?
Whenever Mendel performed a cross with pea plants, he carefully categorized and counted the many offspring. Every time Mendel repeated a particular cross, obtained similar results. For example, whenever Mendel crossed two plants that were hybrid for stem height (Tt), about three fourths of the resulting plants were tall and about one fourth were short. Mendel realized that the principles of probability could be used to explain the results of genetic crosses.
What is the probability of getting Tt?
The probability of getting the genotype Tt depends on the specific genetic cross being considered. For example, if you are crossing two heterozygous parents (Tt x Tt), the probability of obtaining Tt is 50%. If the cross involves different genotypes, such as Tt x TT or Tt x tt, the probabilities will change accordingly. To determine the exact probability, you would need to know the genotypes of the parents involved in the cross.
What is the probability that a seed from the cross will produce a tall plant?
To determine the probability that a seed from a specific cross will produce a tall plant, we need to know the genetic makeup of the parent plants involved. If we assume that tall plants (T) are dominant over short plants (t), the probability can be calculated using a Punnett square based on the genotypes of the parents. For example, if both parents are heterozygous (Tt), the probability of producing a tall plant would be 75%.
How do the principals of probability help explain mendels results?
Mendel's results can be explained through the principles of probability by considering the inheritance of alleles during gamete formation and fertilization. Each gamete carries one allele for each trait, and the combination of alleles from each parent follows a predictable ratio, as outlined in Mendel's laws of segregation and independent assortment. For example, in a monohybrid cross, the 3:1 phenotypic ratio observed in the offspring can be understood through the probabilistic outcomes of allele combinations. Thus, probability provides a framework for predicting the likelihood of different traits appearing in future generations based on Mendel's observations of pea plants.
From the cross AA x AA the probability of producing a homozygous dominant offspring is?
From the cross Aa x Aa, the probability of producing a homozygous dominant offspring is 1/4 or (0.25).
How are the principles of probability used to predict the outcomes of genetic crosses?
Whenever Mendel performed a cross with pea plants, he carefully categorized and counted the many offspring. Every time Mendel repeated a particular cross, obtained similar results. For example, whenever Mendel crossed two plants that were hybrid for stem height (Tt), about three fourths of the resulting plants were tall and about one fourth were short. Mendel realized that the principles of probability could be used to explain the results of genetic crosses.
A genetic cross performed may times produces 798 long stemmed plants and 266 short stemmed plants The probability of obtaining a short stemmed plant in a similar cross is?
The probability of obtaining a short-stemmed plant in a similar cross would be 1/4 or 25%. This is because the ratio of short-stemmed plants to total plants is 1:4 based on the results of the genetic cross performed multiple times.
What is used to predict the outcome of a test cross?
The punnett square which is mainly about probability of genetic crosses
A graphic used to predic the results of a genetic cross?
punnett square
What did mendel predict was the probability of producing a tal plant from a genetic cross of two hybrid tall piants?
Mendel predicted a 3:1 ratio for producing a tall plant from a genetic cross of two hybrid tall plants. This means that there is a 75% probability of producing a tall plant and a 25% probability of producing a short plant.
What is the square used to determine probabillity and results of cross is called?
Square used to determine probability and results of cross is called a Punnett square. It is named after Reginald C. Punnett.
What is the probability of producing a tall pea from a genetic cross between two hybrid tall pea plants?
It is 1/4.
What is the probability of producing a tall pea plants from a genetic cross between two hybrid tall pea plants?
It is 1/4.
A model that helps explain the results of Mendel's crosses is called a?
Punnett square. It is a tool used to predict the genotypes and phenotypes of offspring in a genetic cross. By combining the possible alleles from each parent, the Punnett square shows the potential genetic outcomes of their mating.
What chart is used to predict results of genetic cross?
A Punnett square is commonly used to predict the results of a genetic cross between two individuals. This tool allows for the visualization of possible genotypes that offspring may inherit based on the genotypes of the parents.
What is the probability of getting Tt?
The probability of getting the genotype Tt depends on the specific genetic cross being considered. For example, if you are crossing two heterozygous parents (Tt x Tt), the probability of obtaining Tt is 50%. If the cross involves different genotypes, such as Tt x TT or Tt x tt, the probabilities will change accordingly. To determine the exact probability, you would need to know the genotypes of the parents involved in the cross.
A genetic cross preformed many times produces 798 long-stemmed plants and 266 short-stemmed plants the probability of obtaining a short-stemmed plant in a similar cross is?
266/1,064
