In Figure 13, A is the first stage and F is the final stage - AQA - GCSE Biology - Question 8 - 2023 - Paper 2
Question 8
In Figure 13, A is the first stage and F is the final stage.
Stages B to E are not in the correct order.
Give the correct order of stages A to F.
A ___________ _____... show full transcript
Worked Solution & Example Answer:In Figure 13, A is the first stage and F is the final stage - AQA - GCSE Biology - Question 8 - 2023 - Paper 2
Step 1
Give the correct order of stages A to F.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct order of stages A to F is:
A → E → D → C → B → F
Step 2
Give the number of chromosomes in one cell in Figure 13: * at the start of meiosis
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
At the start of meiosis, there are 16 chromosomes in one cell.
Step 3
Give the number of chromosomes in one cell in Figure 13: * at the end of meiosis
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
At the end of meiosis, there are 8 chromosomes in one cell.
Step 4
Explain why the change in the number of chromosomes is important.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The change in the number of chromosomes is important because it allows for genetic diversity during reproduction. When meiosis occurs, the chromosome number is halved, which ensures that when gametes fuse during fertilization, the original chromosome number is restored in the offspring. This process helps maintain genetic stability across generations while enabling variation that can contribute to evolutionary adaptation.
Step 5
Describe how meiosis produces cells that are genetically different.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Meiosis produces genetically different cells through processes such as crossing over and independent assortment. During prophase I, homologous chromosomes exchange genetic material, which creates new combinations of alleles. Furthermore, during metaphase I, the way these chromosomes are distributed to the daughter cells varies, leading to a mix of maternal and paternal genes in the resulting gametes.
Step 6
What type of substances are labelled A, C, G and T in Figure 14?
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The substances labelled A, C, G, and T in Figure 14 are nitrogenous bases of DNA.
Step 7
How many nucleotides are shown in Figure 14?
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
