steelersfan4343
26.06.2019 •
Biology
The punnett square illustrates a cross for flower position in the pea plant. the phenotypes and genotypes of the parents have been given. the allele for axial position is dominant and represented by a. the allele for terminal flower position is recessive and represented by a. what is the genotype of the offspring? heterozygous homozygous recessive homozygous dominant
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Ответ:
Given –
Plant – Pea plant
Character – flower position
Trait – Axial flower (Dominant)
Terminal flower (Recessive)
Dominant trait is represented by A
Recessive trait is represented by a
I. In case of Homozygous condition –
Axial flower = AA
Terminal flower = aa
Cross between these two would form:
A A
a Aa Aa
a Aa Aa
Phenotype of the offspring = axial flower
Genotype of the offspring = 100% heterozygous dominant with Aa allele
II. In case of Heterozygous condition –
Axial flower = Aa
Terminal flower = aa
Cross between these two would form:
A a
a Aa aa
a Aa aa
Phenotype of the offspring = 50% axial flower, 50% terminal flower
Genotype of the offspring = Axial flower with genotype Aa
Terminal flower with genotype aa
Ответ:
Correct A). Erosion
The greatest threat to agricultural sustainability can be caused due to erosion. Erosion is a natural phenomenon that is known to affect all landforms. In agricultural practice, soil erosion is a process that is known to remove the top fertile layer of the soil, that may be caused by natural or physical agents like wind, water etc. It may also be caused by some form of farming practice such as tillage.