Podcast
Questions and Answers
What type of genetic cross involves a dihybrid heterozygous round, yellow seeded plant and a double recessive plant?
What type of genetic cross involves a dihybrid heterozygous round, yellow seeded plant and a double recessive plant?
When two heterozygous dogs are crossed, what is the expected phenotypic ratio of barking to silent offspring?
When two heterozygous dogs are crossed, what is the expected phenotypic ratio of barking to silent offspring?
Which principle of Mendel explains why the traits for seed shape and color assort independently in a dihybrid cross?
Which principle of Mendel explains why the traits for seed shape and color assort independently in a dihybrid cross?
In a case of incomplete dominance, which of the following exemplifies the concept best?
In a case of incomplete dominance, which of the following exemplifies the concept best?
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Which trait is dominant in the context of the ear type of dogs, according to genetic rules?
Which trait is dominant in the context of the ear type of dogs, according to genetic rules?
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Flashcards
What type of cross is it when a dihybrid heterozygous is crossed with a double recessive?
What type of cross is it when a dihybrid heterozygous is crossed with a double recessive?
This type of cross involves a heterozygous individual for two traits (dihybrid) being crossed with a homozygous recessive individual for both traits.
What is the phenotypic ratio of offspring when a dihybrid heterozygous is crossed with a double recessive?
What is the phenotypic ratio of offspring when a dihybrid heterozygous is crossed with a double recessive?
The phenotypic ratio of offspring in a dihybrid cross with a double recessive parent is 1:1:1:1.
What principle of Mendel is illustrated through the results of this cross?
What principle of Mendel is illustrated through the results of this cross?
The Law of Independent Assortment states that alleles for different traits segregate independently of one another during gamete formation and are inherited independently.
Differentiate between dominance, co-dominance, and incomplete dominance.
Differentiate between dominance, co-dominance, and incomplete dominance.
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What is the expected phenotypic ratio of offspring when dogs heterozygous for both barking and erect ears are crossed?
What is the expected phenotypic ratio of offspring when dogs heterozygous for both barking and erect ears are crossed?
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Study Notes
Question 1
- A dihybrid cross involves crossing two traits with different alleles in heterozygous individuals
- The cross is between a heterozygous round yellow pea plant and a double recessive plant
- The cross is used to determine the genotype and phenotype of the progeny
- The principle of Mendel illustrated is the law of independent assortment
- The genotypes and phenotypes of the offspring can be predicted using a Punnett square.
Question 2
- The problem describes the inheritance of traits in dogs
- The traits are barking (dominant) and silent (recessive), erect and drooping ears (dominant and recessive)
- The question asks about the phenotypic ratios from a cross of heterozygous dogs
- Using a Punnett square, each trait is analyzed independently
- The expected phenotypic ratio resulting from the cross is 9:3:3:1
Question 3
- Dominance occurs when the dominant allele masks the recessive allele in the heterozygote
- Co-dominance occurs when there is a blending of traits from the dominant and recessive alleles.
- Incomplete dominance occurs when the dominant allele does not completely mask the recessive allele, resulting in an intermediate.
- Example traits can be given but may require context to understand fully
Question 4
- A dihybrid cross involves crossing heterozygous traits in a plant
- This is a cross between a heterozygous tall yellow pea plant and a double recessive plant.
- The cross is used in genetics to determine the genotype and phenotype of the offspring
- The principle of Mendel illustrated is the law of independent assortment
- By use of a Punnett square, the expected genotypes and phenotypes of the progeny can be determined.
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Description
Test your understanding of genetics through dihybrid crosses and inheritance patterns. This quiz covers Mendel's laws of independent assortment, phenotypic ratios, and the use of Punnett squares. Explore how traits are passed down in both pea plants and dogs.
