1 (a) Figure 1 shows a pea plant with flowers - Edexcel - GCSE Biology - Question 1 - 2019 - Paper 1
Question 1
1 (a) Figure 1 shows a pea plant with flowers.
(i) Name the type of reproduction involving flowers.
(ii) What is the advantage of reproduction involving flowers?
A... show full transcript
Worked Solution & Example Answer:1 (a) Figure 1 shows a pea plant with flowers - Edexcel - GCSE Biology - Question 1 - 2019 - Paper 1
Step 1
Name the type of reproduction involving flowers.
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Answer
The type of reproduction involving flowers is called sexual reproduction. This process involves the fusion of male and female gametes, leading to genetic diversity in the offspring.
Step 2
What is the advantage of reproduction involving flowers?
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Answer
The advantage of reproduction involving flowers is that B) there is variation in the offspring. This genetic variation allows for adaptability and evolution within species.
Step 3
Complete the Punnett square to show the genotypes of the offspring.
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Answer
r
r
R
Rr
Rr
R
Rr
Rr
For this cross, all offspring will have the genotype Rr, indicating they will exhibit the dominant round seed phenotype.
Step 4
State the percentage of the offspring that will produce round seeds.
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Answer
100% of the offspring will produce round seeds because they all carry the dominant allele R.
Step 5
Which scientist discovered the basis of genetic inheritance by crossing pea plants?
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Answer
The scientist who discovered the basis of genetic inheritance by crossing pea plants is D) Gregor Mendel.
Step 6
Describe how a person inherits the blood group AB.
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Answer
A person inherits the blood group AB through the combination of one allele A from one parent and one allele B from the other parent. The A and B alleles are co-dominant, meaning that both traits are expressed equally in the phenotype, resulting in blood group AB.
