why did mendel choose pea plant for his experiment?
Gregor Mendel chose the pea plants for his experiments because the garden pea is an ideal subject in the study of genetics for the following reasons:
-- presence of observable traits with contrasting forms
-- produces many offspring in one cross
-- short life cycle
-- ease in manipulating pollination (cross pollination)
Pea plants had the following chacracteristics:
- plants were sexually reproducing with bisexual flowers
- self pollination and self fertilization is possible
- the life cycle was completed in one season
- hybrids were perfectly fertile
- many varieties with well-defined characters were available i.e. presence of seven pairs of contrasting or allelomorphic characters
Pea plants (leguminosae) have an irregular flower in which the top part of the corolla is much larger than the lower part (Hitchcock and CronquistFlora of the Pacific Northwest p228). If you haven't ever seen a pea flower, it looks much like a snap dragon bloom. This feature keeps the flowers from freely pollinating each other by wind, as they are tightly shut. If protected from pollinating insects, they will only self pollinate, or if the anthers are clipped off they can be very selectively pollinated by a person. This gave Mendel much tighter control over the crossbreeding of the plants.
hope the answer for the question....
- many varieties were available in alternative forms of a character ..
- varieties were available in pure forms dat bred true ...
- peas r normalyy sef pollinated but they could be cross pollinated by removing the corresponding reproductive parts
- they have a short life cycle ...
- they produce large number of seeds and thus a large number of offsprings ...
Hope this helps !!
Because when we have to do any experiment. We want results faster. &the pea plant is best for these type of experiments : it has a short life span.. shows result faster. hybrids were perfectly fertile. like above mentioned it is ease in manipulating pollination.(cross pollination) HOPE IT HELPS YOU :)
it has a short life span..
shows result faster.
hybrids were perfectly fertile.
like above mentioned it is ease in manipulating pollination.(cross pollination)
HOPE IT HELPS YOU :)
· they are normally self pollinated
· they also be cross pollinated by preventing self pollination
· they had many contrasting characters
· a large number of flowers can be produced in a short time
· flowers can be easily handled
· bisexual flowers
· flowers are medium sized
· it is a self - fertilizing plant
beacuse the pea plant was easy to grow and he could notice the f2 and f3 generations which he could not do with humans as by the time he would die the f 2 generation wudnt be recorded . also in a pea plant they were only 2 options of inheritance for eg either the seed would be round or wrinkled. so it was easy unlike in humans which have many traits alltogether it was easy for him differentiate in peas
there were 7 contrasting characters which could be used to interpret the laws of inheritance
moreover using any one character meant that the next progeny will exhibit any one of the traits the traits did not mix up causing confusion as in humans
Easy to Cultivate:
Pea plant (Pisum sativum) was easy to cultivate. It grew well in his garden.
Its flowers were hermaphrodite I.e. pea plant have both male and female sexual organs.
Cross-fertilization (Cross-Pollination) Easily Controlled:
It was normally self-fertilizing (self-pollinating) that is the fertilization of plants and some invertebrate animals by their own pollen or sperm rather than that of another individual, but could also be cross fertilized (cross-pollinated) that is the transfer of pollen grains from an anther of a flower of one plant to a stigma of a flower of another plant of the same species.
Short Generation Time:
As the time gap between generations was short, Mendel could raise many generations of pea within a short time. This is one of the main reason for choosing Pea plant ( Pisum sativum).
Many Distinct Traits:
Pea had many sharply distinct. its each trait had two clear cut alternative forms or varieties:
- easy to cultivate:pea plant was easy to cultivate.
- short generation time:as the time gap between two generation were short,mendel could raise many generations of pea plant within a short period of time.
- hermaphrodite:that is pea plant had both male and female sexual organs.
- many distinct traits:pea plants had many distinct traits its each trait had varieties eg seeds were round or wrinkle,plant height was either tall or short etc.
Mendel observed that his pea plants had several distinguishing physical features, such as plant size and pea color, that were governed by basically two alleles, or forms of genes. In general, pea plants grow well with minimal supervision and care. They can self-fertilize, so Mendel could pollinate the plants himself. The large number of offspring produced per mating gave Mendel a good number of plants to observe and work out the ratios of dominant and recessive alleles.
For example-some pea plants were tall whereas others were dwarf.Some produce round yellew seeds whereas other produced wrinkled-green seeds,etc.Another reason for choosing pea plant was that they were self pollinating.
1. It is a small herbaceous plant that produces many seeds.
2. It is an annual plant and completes its lifecycle within 3 to 4 months, hence he could produce three generations in a year.
3. It is naturally self pollinating but could be modified for cross pollination.
4. The plant showed nearly seven pairs of contrasting characters.
(i)They grow quickly.?
(ii)They have a short life-cycle.
(iii)They are easily self- and cross-pollinated and produces many offspring in one cross.
(iv)They have easily observed characteristics.