Grade 10 Genetics & inheritance worksheet

What is on the worksheet

1. In pea plants, the allele for a tall stem (T) is dominant over the allele for a short stem (t). Two plants, tt × tt, are crossed. What percentage of the offspring are expected to show a short stem?

2. In pea plants, the allele for purple flowers (P) is dominant over the allele for white flowers (p). Two plants, PP × Pp, are crossed. What percentage of the offspring are expected to show purple flowers?

3. A fictional diploid organism has 98 chromosomes in a normal somatic nucleus. In the standard meiosis model, how many chromosomes are in a haploid gamete? Round to 3 decimal places if needed.

4. In the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 260 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.

5. Using base-pairing rules, which sequence pairs with the DNA strand GGAATAGA, read base by base in the same order?

   1. CCUUAUCU
   2. CATTATCT
   3. CCTTATCT
   4. GGAATAGA

6. A fictional diploid organism has 12 chromosomes in a normal somatic nucleus. In the standard meiosis model, how many chromosomes are in a haploid gamete? Round to 3 decimal places if needed.

7. A DNA template strand reads AATATA. Which mRNA sequence is transcribed from it, read base by base in the same order?

   1. UUAUAU
   2. UUAAAU
   3. AATATA
   4. TTATAT

8. In the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 252 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.

9. In the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 388 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.

10. In a canonical double-stranded DNA sample, adenine is 40% of all bases. Find the guanine percentage, assuming A = T and C = G. Round to 3 decimal places if needed. Answer in %.

11. In a canonical double-stranded DNA sample, adenine is 28% of all bases. Find the guanine percentage, assuming A = T and C = G. Round to 3 decimal places if needed. Answer in %.

12. In the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 84 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.

13. A fictional diploid organism has 72 chromosomes in a normal somatic nucleus. In the standard meiosis model, how many chromosomes are in a haploid gamete? Round to 3 decimal places if needed.

14. In the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 556 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.

15. In the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 124 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.

16. In a canonical double-stranded DNA sample, adenine is 18% of all bases. Find the guanine percentage, assuming A = T and C = G. Round to 3 decimal places if needed. Answer in %.

17. Using base-pairing rules, which sequence pairs with the DNA strand TATTGCTA, read base by base in the same order?

    1. ATAACGAT
    2. TATTGCTA
    3. AUAACGAU
    4. ATAACGAA

18. A DNA template strand reads TGCTCA. Which mRNA sequence is transcribed from it, read base by base in the same order?

    1. AGGAGU
    2. ACGAGT
    3. TGCTCA
    4. ACGAGU

19. In the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 468 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.

20. In the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 576 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.