Mendel's Law of Dominance
Why do some traits vanish in one generation but reappear in the next?
Mendel bred tall and short pea plants to understand how traits are inherited. The resulting offspring were all tall, forming the first filial or F1 generation.
He observed that traits like short stem height disappeared in the F1 generation.
However, when he self-pollinated the F1 generation, the resulting F2 generation had 75% tall plants and 25% short plants, showing that the recessive trait was masked in the F1 generation but still present.
Mendel concluded that each plant carries two factors, now called genes, for every trait. These genes exist in different versions called alleles.
The dominant allele for tallness, represented as uppercase T, masks the recessive allele for shortness, represented as lowercase t. The short trait only appears when two recessive alleles are inherited.
From these findings, he formulated the Law of Dominance, which states that when an organism has two different alleles for a trait, the dominant allele determines appearance, while the recessive allele remains hidden unless inherited from both parents.
Mendel’s Law of Dominance
Gregor Mendel, the father of genetics, formulated the Law of Dominance through his experiments with pea plants. The alleles f…
Why do some traits vanish in one generation but reappear in the next?
Mendel bred tall and short pea plants to understand how traits are inherited. The resulting offspring were all tall, forming the first filial or F1 generation.
He observed that traits like short stem height disappeared in the F1 generation.
However, when he self-pollinated the F1 generation, the resulting F2 generation had 75% tall plants and 25% short plants, showing that the recessive trait was masked in the F1 generation but still present.
Mendel concluded that each plant carries two factors, now called genes, for every trait. These genes exist in different versions called alleles.
The dominant allele for tallness, represented as uppercase T, masks the recessive allele for shortness, represented as lowercase t. The short trait only appears when two recessive alleles are inherited.
From these findings, he formulated the Law of Dominance, which states that when an organism has two different alleles for a trait, the dominant allele determines appearance, while the recessive allele remains hidden unless inherited from both parents.
Why do some traits vanish in one generation but reappear in the next?
Mendel bred tall and short pea plants to understand how traits are inherited. The resulting offspring were all tall, forming the first filial or F1 generation.
He observed that traits like short stem height disappeared in the F1 generation.
However, when he self-pollinated the F1 generation, the resulting F2 generation had 75% tall plants and 25% short plants, showing that the recessive trait was masked in the F1 generation but still present.
Mendel concluded that each plant carries two factors, now called genes, for every trait. These genes exist in different versions called alleles.
The dominant allele for tallness, represented as uppercase T, masks the recessive allele for shortness, represented as lowercase t. The short trait only appears when two recessive alleles are inherited.
From these findings, he formulated the Law of Dominance, which states that when an organism has two different alleles for a trait, the dominant allele determines appearance, while the recessive allele remains hidden unless inherited from both parents.
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