25 Questions
What is the total yield in kg/du for the genotype Aabb?
17
If a corn plant has the genotype AaBb, what is the yield contributed by allele 'A' alone?
4 kg/du
Which of the following genotypes would yield 19 kg/du?
AAbb
If gene B contributes 6 kg/du in the AABB genotype, how much does gene b contribute in the same genotype?
2 kg/du
What is the total yield in kg/du for the genotype AABb?
16
What genetic phenomenon can mask the contribution of recessive alleles at a locus?
Epistasis
In the context of genetic variance, what is the term for an allele that masks the expression of another allele?
Dominant allele
Which type of allele would be likely to hide the presence of a recessive allele at a genetic locus?
Dominant allele
When a dominant allele masks the expression of a recessive allele, what genetic concept is being illustrated?
Epistasis
What term describes the phenomenon where one gene's expression is dependent on another gene's presence?
Epistasis
What does a high h2 indicate about a trait?
The trait is effective and under genetic control
How does h2 relate to the effectiveness of trait selection?
Lower h2 indicates more effective trait selection
In the context of genetics, what does it mean if a trait has a low h2?
The trait is not under genetic control
How does the effectiveness of selection change with a low h2?
Selection becomes less effective
What can be inferred about a trait with a high h2 and effective selection?
The trait is under genetic control and responds well to selection
What is the phenotype of the heterozygote if the gene exhibits complete dominance?
It has an equal effect as the homozygote.
What does a low h2 value indicate about select?
Select is ineffective
How does a low h2 value relate to environmental influence?
Trait is more under the environmental influence
If a gene displays complete dominance, what would be the metric value of the AaBb heterozygote based on the example provided?
20 kg/du
How does complete dominance affect the expression of genes in heterozygotes?
It masks the expression of the recessive allele.
In the context of the text, what does 'ineffective' mean?
Unproductive
Why might an ineffective select be problematic?
Does not achieve the desired outcome
What happens to the phenotype of a heterozygote if a gene does not exhibit complete dominance?
It shows an intermediate phenotype between the homozygotes.
What is implied about a trait when it is more under environmental influence?
It is less genetically determined
In terms of gene expression, what is unique about complete dominance in heterozygotes?
The dominant allele completely suppresses the recessive allele.
Test your understanding of how different genetic alleles contribute to corn yield. Explore how gene combinations determine the yield of corn in a hypothetical scenario.
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