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Based on the data, it can be stated that in garden peas - further crosses are required to determine the nature of pod colour inheritance - VCE - SSCE Biology - Question 31 - 2015 - Paper 1
Question 31
Based on the data, it can be stated that in garden peas - further crosses are required to determine the nature of pod colour inheritance. - inflated pod shape is do... show full transcript
Worked Solution & Example Answer:Based on the data, it can be stated that in garden peas - further crosses are required to determine the nature of pod colour inheritance - VCE - SSCE Biology - Question 31 - 2015 - Paper 1
Step 1
Further crosses are required to determine the nature of pod colour inheritance.
Answer
To determine the nature of pod color inheritance, we should conduct additional genetic crosses that will allow us to observe the phenotypic ratios of the progeny. This can help ascertain if pod color traits follow a Mendelian inheritance pattern, which is essential for establishing how traits are passed through generations.
Step 2
Inflated pod shape is dominant to constricted pod shape.
Answer
In garden peas, the trait for inflated pod shape (denote this as 'I') is dominant over the trait for constricted pod shape (denote this as 'i'). Therefore, when plants with at least one 'I' allele are crossed with those that have two recessive 'ii' alleles, the offspring will display the inflated pod phenotype.
Step 3
Pod colour and shape are co-dominant characteristics.
Answer
In the case of pod color and shape, both traits exhibit co-dominance. This means that when both alleles are present, they will express themselves simultaneously in the phenotype. For example, if both green (G) and yellow (Y) pod colors are present, the offspring may display a mixture or banding of both colors.
Step 4
Green pod colour is recessive to yellow pod colour.
Answer
The trait for green pod color (denote as 'g') is recessive to yellow pod color (denote as 'G'). This means that only when both alleles are 'gg' will the plant exhibit the green pod phenotype. Conversely, one 'G' allele will result in the yellow pod phenotype.