Question 3
A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because
(a) tallness is the dominant trait
(b) shortness is the dominant trait
(c) tallness is the recessive trait
(d) height of pea plant is not governed by gene ‘T’ or ‘t’
Question 3
A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because
(a) tallness is the dominant trait
(b) shortness is the dominant trait
(c) tallness is the recessive trait
(d) height of pea plant is not governed by gene ‘T’ or ‘t’
(a) tallness is the dominant trait
Mendel's model for the F1 generation is summarised in the table. The model states that each trait is controlled by a pair of hereditary packets we now call genes. One packet comes from each parent. The alleles (= forms) of the gene for height are the same in true breeding plants ( TT and tt parent plants ). Cross breeding TT with tt plants produces Tt plants in the first or F1 generation. The F1 plants receive a 'T' allele from the tall parent and a 't' allele from the short parent. The F1 plants are tall because the 'T' allele is expressed and "cover up" the 't' allele. So the 'T' (tall) allele is called dominant and 't' (short) allele is called recessive.
(a) tallness is the dominant trait
Mendel's model for the F1 generation is summarised in the table. The model states that each trait is controlled by a pair of hereditary packets we now call genes. One packet comes from each parent. The alleles (= forms) of the gene for height are the same in true breeding plants ( TT and tt parent plants ). Cross breeding TT with tt plants produces Tt plants in the first or F1 generation. The F1 plants receive a 'T' allele from the tall parent and a 't' allele from the short parent. The F1 plants are tall because the 'T' allele is expressed and "cover up" the 't' allele. So the 'T' (tall) allele is called dominant and 't' (short) allele is called recessive.
