17 Questions
What is incomplete dominance?
When one allele is not completely dominant over the other.
What did Mendel investigate in garden pea plants?
Characters with opposing traits
What did Mendel investigate in garden pea plants?
Their characters manifested as two opposing traits
What is the result of co-dominance?
The F1 generation resembles both parents.
What technique did Mendel use to study the inheritance of one gene in pea plants?
Cross-pollination
What was unique about Mendel's investigations?
They applied statistical analysis and mathematical logic to problems in biology for the first time
What was the proportion of dwarf plants in the F2 generation in Mendel's experiments?
1/4th
What did Mendel observe when he crossed tall and dwarf pea plants?
All the F1 progeny plants were tall
How do dominant alleles affect phenotype?
They produce the original phenotype
What did Mendel find when he self-pollinated the tall F1 plants?
Some of the offspring were tall and some were dwarf
What was significant about Mendel's investigations in biology?
He applied statistical analysis and mathematical logic to problems in biology for the first time
What is the I gene responsible for in humans?
Blood type
What did Mendel propose based on his experiments with garden pea plants?
The laws of inheritance in living organisms
Which alleles are completely dominant over i?
I A and I B
What was the proportion of dwarf plants in the F2 generation?
1/4th
Which allele expresses when I A and i are present?
I A
How many genotypes of human ABO blood types are there?
6
Study Notes
- Gregor Mendel conducted hybridisation experiments on garden peas in the mid-nineteenth century.
- Mendel proposed the laws of inheritance in living organisms.
- Statistical analysis and mathematical logic were applied to problems in biology for the first time during Mendel's investigations.
- Mendel investigated characters in garden pea plants that were manifested as two opposing traits.
- Mendel selected 14 true-breeding pea plant varieties, as pairs which were similar except for one character with contrasting traits.
- Mendel crossed tall and dwarf pea plants to study the inheritance of one gene and observed that all the F1 progeny plants were tall.
- Mendel self-pollinated the tall F1 plants and found that in the Filial2 generation some of the offspring were 'dwarf'.
- The proportion of plants that were dwarf were 1/4th of the F2 plants while 3/4th of the F2 plants were tall.
- Similar results were obtained with the other traits that Mendel studied.
- The contrasting traits did not show any blending at either F1 or F2 stage.
Test your knowledge of Gregor Mendel's groundbreaking experiments on garden peas with our quiz! Learn about the laws of inheritance proposed by Mendel and how statistical analysis and mathematical logic were applied to biology for the first time during his investigations. Discover how Mendel selected true-breeding pea plant varieties with contrasting traits to study how genes are passed down to offspring. See if you can recall the results of Mendel's experiments and how they helped lay the foundation for modern genetics.
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