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If black body color is recessive and gray is dominant, we can assume that the black body color is represented by the genotype "bb". Given that gray is dominant, individuals with gray bodies could be either "GG" or "Gg". Thus, for black body color to appear in offspring from two gray-bodied flies, both parents would need to be carriers of the black body allele (each "Gg" or "gg"). Therefore, if both parents are carriers, the expected ratio of black-bodied offspring would be 25% (1/4). In a sample size of 200 offspring, we would expect around 50 flies to have black bodies.
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Suppose that a gray fruit fly heterozygous for the alleles for body color is crossed with one that has a black body What percentage of the offspring would you expect to have black bodies?
You would expect 50% of the offspring to have black bodies. This is because the offspring will inherit one allele for black body color from the black parent, and one allele for gray body color from the heterozygous gray parent. The black allele is dominant over the gray allele.
If the short haired cat in the P generation were purebred what would you expect the offspring to look like?
Yes it is purebred. Because it had to sex to come in life. thanks to everyone.
In Purple flower color dominant over white flower color peas. Suppose two white flowered pea plants are crossed and produce 1000 offspring. How many of those offspring would you expect to have whit?
1000
Would you expect there to be more children with the dominant phenotype or recessive phenotypewhy?
There would likely be more children with the dominant phenotype because it only requires one copy of the dominant allele to express the dominant trait, whereas the recessive phenotype requires two copies of the recessive allele.
How do geneticists normally tell whether an organism exhibiting a dominant phenotype is homozygous or heterozygous?
They perform a test cross. A test cross takes the unknown genotype and crosses it with a known homozygous recessive. If the F1 generation is all dominant, then they know the organism was a homozygous recessive. If recessive offspring appear, then the organism was a heterozygote. As an example, consider a gene with two alleles, A and a, with Adominant. Now consider the test cross. The unknown genotype can only be one of two possibilities: AA (homozgous dominant) Aa (heterozygous) In a test cross,the unknown genotype is crossed with a known homozygous recessive. Since there are only two possible unknown genotypes, there can be only two possible results. First, consider the case of the unknown genotype being a homozygous dominant. The cross looks like this: AA X aa Remember that a homozygote for an allele can only produce one kind of gamete. In this case the homozygous dominant can only produce gametes with the allele A in them, while the homozygous recessive can only produce gametes with the recessive allele a in them. This means the F1 offspring can only be ONE genotype; Aa. Therefore, all of the offspring would have the dominant phenotype. Now consider the other possible cross, where the unknown genotype is heterozygous: AaX aa Remember that a heterozygote can produce two types of gametes. In this case, the unknown would produce gametes with the dominant allele A or the recessive allele a. The homozygous recessive would still only produce one kind gamete, with the recessive a allele. Therefore, we expect to see only two genotypes in the F1, Aa and aa, in equal proportions. In either case, only one test cross is needed to tell one immediately the nature of the unknown genotype. If all of the F1 are of the dominant phenotype, then the unknown genotype must be homozygous dominant; if a mixture of phenotypes appears in equal proportion, then the unknown genotype must be a heterozygote.
In fruit flies, gray body color is dominant over black body color. Suppose two fruit flies heterozygous for the alleles that carry body color are crossed and 200 offspring are produced. How many would you expect to have black bodies?
50
Suppose that a gray fruit fly heterozygous for the alleles for body color is crossed with one that has a black body What percentage of the offspring would you expect to have black bodies?
You would expect 50% of the offspring to have black bodies. This is because the offspring will inherit one allele for black body color from the black parent, and one allele for gray body color from the heterozygous gray parent. The black allele is dominant over the gray allele.
What would you expect if you breed or mate 2 different true breeding stocks of plants?
If one trait is dominant over the other, then you would expect all of the offspring to have the dominant trait.
If green pea pods are dominant over yellow pea pods What percent of offspring would you expect to have green pea pods?
Tsgsd
What ratio would you expect in a two factor cross if both parents are heterozygous?
In a two-factor cross where both parents are heterozygous for two traits (e.g., AaBb x AaBb), you would expect a phenotypic ratio of 9:3:3:1 in the offspring. This ratio represents the combinations of the dominant and recessive traits for both factors. The 9 represents the offspring with both dominant traits, while the 3s represent the combinations with one dominant and one recessive trait, and the 1 represents the offspring with both recessive traits.
If they have four offspring how many would you predict would have red leaves?
To predict how many offspring would have red leaves, we need to consider the genetics involved, specifically if the trait for red leaves is dominant or recessive. If red leaves are dominant and both parents have at least one red leaf allele, we could expect a majority of the offspring to exhibit the red leaf trait. If both parents are heterozygous for the trait, we might predict about 75% of the four offspring will have red leaves. Therefore, you could expect 2 to 3 offspring to have red leaves, depending on the specific genetic makeup of the parents.
Purple flower color is dominant over white flower color in peas. Suppose two white flowered pea plants are crossed and produce 1000 offspring. How many of those offspring would you expect to have whit?
1000
Purple flower color is dominant over white flower color in peas. Suppose two white flowered pea plants are crossed and produce 1000 offspring. How many of those offspring would you expect to have white flowers?
1000
If the short haired cat in the P generation were purebred what would you expect the offspring to look like?
Yes it is purebred. Because it had to sex to come in life. thanks to everyone.
What law BEST explains why you would expect 75 percent of the offspring to have large teeth?
The law that best explains this expectation is Mendel's Law of Segregation. According to this law, alleles for a trait segregate independently during gamete formation, resulting in a predictable ratio of traits in the offspring. If large teeth is a dominant trait, and both parents are heterozygous (carrying one allele for large teeth and one for small), we would expect a 3:1 ratio of large to small teeth in the offspring. This means that approximately 75 percent of the offspring would exhibit the large teeth phenotype.
In Purple flower color dominant over white flower color peas. Suppose two white flowered pea plants are crossed and produce 1000 offspring. How many of those offspring would you expect to have whit?
1000
What ratio of plants in the offspring would you predict from a Yy x Yy cross?
In a Yy x Yy cross, where "Y" represents a dominant trait and "y" represents a recessive trait, you can expect a phenotypic ratio of 3:1 among the offspring. This means that approximately 75% of the plants would display the dominant trait (YY or Yy), while about 25% would display the recessive trait (yy). The genotypic ratio would be 1 YY : 2 Yy : 1 yy.
