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mestny [16]
3 years ago
13

Pollination is:

Biology
1 answer:
frosja888 [35]3 years ago
8 0

Answer:

c. the transfer of pollen from a stamen to a pistil

Explanation:

a. the development of a new embryo

b. the development of a pollen grain

c. the transfer of pollen from a stamen to a pistil

d. the transfer of pollen from a pistil to a stamen

Pollination is the act of transferring pollen grains from the male anther of a flower to the female stigma. The process of pollination begins when the pollen grains from the respective flowers lands on the stigma and form a pollen tube.

In general terms, pollination is the process of reproduction in plants. It is the transfer of pollen to an ovule that enables fertilization and the production of seeds, and this process requires at least one pollination agent. In this article, we will discuss what are the most important agents for Pollan grains transfer.

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d1i1m1o1n [39]

Answer:

<h2>616 Short with white flower </h2><h2>1850 Tall with white flower </h2><h2>1850 Short with purple flower</h2>

Explanation:

A dihybrid cross is in which two genes of two different traits are crossed

As given, two dihybrid pea plants (tall with purple flower) are mated, resulting 5550 out of 9866 were tall with purple.

T= tall  

t= short,

P= purple,

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So genotype of parents are TtPp ; T is dominant over t, P is dominant over p.

Crossing between two parens=  TtPp ×  TtPp

so gamets are  = parent 1: TP, Tp, tP, tp and parent 2: TP, Tp, tP, tp

Hence the four different gametes formed.

Now arrange the gametes on the top and left side of a Punnett square it'll genotypically results into different combinations, by which phenotypic ratios can be calculated.

offspring are = TTPP, TTPp, TtPP, TtPp....................TTpp, Ttpp.....ttPP, ttPp.......ttpp

(T_P_)= Tall with purple flower,

(T_pp)= tall with white  flower,

(ttP_)= short with purple  flower,

(ttpp)= short with white  flower.

so it show  12:3:3:1 ratio'

Phenotypic classes are:

616 Short with white flower

1850 Tall with white flower

1850 Short with purple flower

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75 soruluk bi biyoloji testi lütfen yardım et​
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