List two differences in tabular form between dominant trait and recessive traits. What percentage/proportion of the plants in the F2 generation/progeny were round, in Mendel’s cross between round and wrinkled pea plants?
Solution:
Mendel conducted a dihybrid cross to study that traits are inherited independently. He considered two traits at a time: these were:- seed colour & seed shape in which Yellow colour (YY) and round shape (RR) is dominant over green colour (yy) and wrinkled shape (rr). Round (yellow or green)- 12/16*100 = 75%
Dominant trait | Recessive trait |
Dominant traits are those traits which are expressed even in the presence of one copy of an allele for a particular trait in the gene. | Recessive traits are those that are expressed only when two copies of an allele are present in the gene. |
Traits that are observed are called dominant | Traits that are masked by the dominant gene or suppressed are called recessive. |
Dominant traits of pea plant:-Tall and round seeds. | Recessive traits of pea plant:- Dwarf and wrinkled seeds. |
Mendel conducted a dihybrid cross to study that traits are inherited independently. He considered two traits at a time: these were:- seed colour & seed shape in which Yellow colour (YY) and round shape (RR) is dominant over green colour (yy) and wrinkled shape (rr). Round (yellow or green)- 12/16*100 = 75%