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What fraction of the cross in figure 10-7 will be recessive for both traits?
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∙ 11y ago
1/16
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∙ 11y ago
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What is the name for a cross between an individual of unknown genotype and a homozygous recessive?
A cross between a homozygous recessive and an individual of unknown genotype is called a test cross.The homozygous recessive can only pass on a recessive allele to the offspring, and so any recessive in the other parent will show up in the phenotype (detectable characteristics) of some of the offspring.
If a test cross between a homozygous recessive and heterozygous allele will yield what percent of offspring as homozygous recessive?
A test cross between a homozygous recessive and a heterozygous individual will yield 50% of offspring as homozygous recessive. This is because all the offspring will inherit one recessive allele from the homozygous recessive parent.
Why do some traits skip a generation?
Some traits may skip a generation due to the way they are inherited. This can occur if the trait is recessive and carried by a parent who does not show the trait themselves. In the next generation, when both parents pass on the recessive trait, it can manifest in the offspring.
The phenotypic ratio for the F2 generation in a dihybrid cross will theoretically be?
9:3:3:1, where 9 represents the offspring with both dominant traits, 3 represents the offspring with one dominant and one recessive trait for each pair of alleles, 3 represents the offspring with the other combination of dominant and recessive traits, and 1 represents the offspring with both recessive traits. This ratio is based on the independent assortment of alleles during meiosis.
A test cross made with a cat that may be heterozygous for a recessive trait what is the presumed genotype of the cat explain?
If the cat is suspected to be heterozygous for a recessive trait, the presumed genotype would be Aa, where A represents the dominant allele and a represents the recessive allele. This means the cat has one dominant allele and one recessive allele for the trait in question. The test cross would involve crossing this cat with a homozygous recessive individual to determine the genotype of the cat.
In a dyhibrid cross the expected porportion of offspring showing both recessive traits is?
The expected proportion of offspring showing both recessive traits in a dihybrid cross is 1/16 or 6.25%. This is because each trait segregates independently and the probability of both recessive traits occurring together is the product of the individual probabilities (1/4 x 1/4 = 1/16).
What are the ratios of a heterozygous dihybrid cross and what is the probability of having the recessive trait show?
9:3:3:1 The probability of having both recessive traits is 1:16.
In the F2 generation in Mendel's experiment's the ratio of dominant to recessive traits was?
The ratio of dominant to recessive traits in the F2 generation of Mendel's experiments was 3:1. This is known as the phenotypic ratio for a monohybrid cross, where three individuals display the dominant trait for every one individual displaying the recessive trait.
When a first generation plant self pollinates what is the ratio of dominate to recessive traits in the second generation plants?
When a first generation plant self pollinates, the ratio of dominant to recessive traits in the second generation plants is typically 3:1. This is based on Mendel's principle of segregation, which predicts that in a monohybrid cross, three plants will exhibit the dominant trait and one will exhibit the recessive trait.
When trying to find an unknown genotype you must perform a?
test cross. This involves crossing the individual with a homozygous recessive individual to determine the unknown genotype based on the phenotypic ratios of the offspring.
Which letters are used for dominated and recessive characteristics?
In genetics, dominant traits are typically represented by uppercase letters (e.g., "A"), while recessive traits are represented by lowercase letters (e.g., "a"). This notation helps geneticists distinguish between dominant and recessive alleles in a genetic cross.
What is mendels ratio for dominant to recessive traits?
its 3:1
What is the name for a cross between an individual of unknown genotype and a homozygous recessive?
A cross between a homozygous recessive and an individual of unknown genotype is called a test cross.The homozygous recessive can only pass on a recessive allele to the offspring, and so any recessive in the other parent will show up in the phenotype (detectable characteristics) of some of the offspring.
If a homozygous dominant is crossed with a homozygous recessive for a given trait the offspring will be?
The phenotype will show the dominant trait. All dominant traits mask recessive ones; If the genotype is heterozygous (One dominant and one recessive) the organism's phenotype will be dominant.
What best describes the F1 offspring of mendels two factor cross?
The F1 offspring of Mendel's two-factor cross will all display the dominant phenotype for both traits due to the dominance of the alleles. They will be heterozygous for both traits, carrying one dominant and one recessive allele for each trait.
A cross between homozygous purple-flowered and homozygous white-flowered pea plants results in offspring with purple flowers This demonstrates?
A homozygous purple flower and a homozygous white flower having offspring that are purple is an example of dominance. Traits that yield to other traits is referred to as recessive. So in this case Purple was the dominant trait and White was the recessive trait.
If a test cross between a homozygous recessive and heterozygous allele will yield what percent of offspring as homozygous recessive?
A test cross between a homozygous recessive and a heterozygous individual will yield 50% of offspring as homozygous recessive. This is because all the offspring will inherit one recessive allele from the homozygous recessive parent.
