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A self-fertilizing trihybrid plant forms
[2004]
  • a)
    8 different gametes and 64 different zygotes
  • b)
    4 different gametes and 16 different zygotes
  • c)
    8 different gametes and 16 different zygotes
  • d)
    8 different gametes and 32 different zygotes
Correct answer is option 'A'. Can you explain this answer?
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A self-fertilizing trihybrid plant forms[2004]a)8 different gametes an...
A self-fertilizing trihybrid plant forms 8 different gametes and 64 different zygotes. The genotype of trihybrid plant is AaBbCc. Number of gametes formed = 2n = 23 = 8 Here n = no. of heterozygosity = 3 in present case.
No. of zygotes formed = 82 = 64.
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A self-fertilizing trihybrid plant forms[2004]a)8 different gametes an...
Formation of gametes in self-fertilizing trihybrid plant

A self-fertilizing trihybrid plant would have three pairs of contrasting traits. For example, let's consider three pairs of traits - A/a, B/b, and C/c.

During gamete formation, the alleles segregate independently of each other, following the law of independent assortment. This means that the different alleles for each trait would separate randomly into gametes, resulting in eight different possible gametes.

The possible gametes that can be formed in this case are:

- ABC
- ABc
- AbC
- Abc
- aBC
- aBc
- abC
- abc

Formation of zygotes

When two gametes unite, they form a zygote with two alleles for each trait. The number of different possible zygotes can be calculated by multiplying the number of possible alleles for each trait.

In this case, each trait has two possible alleles (A or a, B or b, and C or c). Therefore, the number of possible zygotes can be calculated as:

2 x 2 x 2 = 8

This means that there are 8 different possible zygotes that can be formed when two gametes unite.

Total number of possible zygotes

To calculate the total number of possible zygotes, we need to multiply the number of different possible gametes by the number of different possible zygotes that can be formed from each gamete.

In this case, there are 8 different possible gametes and each gamete can form 8 different possible zygotes. Therefore, the total number of possible zygotes can be calculated as:

8 x 8 = 64

Therefore, a self-fertilizing trihybrid plant can form 8 different gametes and 64 different zygotes. The correct option is (a).
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A self-fertilizing trihybrid plant forms[2004]a)8 different gametes an...
No of gametes =2^n=2^3=8
no of zygote=8^2=64
thus 8 different gametes and 64 different zygote
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In pteridophytes the sporophyte produces spores through meiosis. The spores are produced by the sporangia in the spore mother cells. These spores germinate to give rise to gametophytes. The gametophytes bear male and female sex organs. Water is required for transfer of antherozoids - the male gametes released from the male sex organ to the mouth of female sex organ. Fusion of male gamete with the egg result in the formation of zygote. Zygote thereafter produces a multicellular well-differentiated sporophyte. In majority of the pteridophytes all the spores are of similar kinds. However, some genera also produce two kinds of spores, macro (larg e) and micro (small) spores. The megaspores and microspores germinate and give rise to female and male gametophytes, respectively. In these plants, the female gametophytes are retained on the parent sporophytes for variable periods. The development of the zygotes develop into young embryos within the female gametophytes. This event is a precursor to the seed habit considered an important step in evolution.Q. Pteridophytes are __________ plants.

In pteridophytes the sporophyte produces spores through meiosis. The spores are produced by the sporangia in the spore mother cells. These spores germinate to give rise to gametophytes. The gametophytes bear male and female sex organs. Water is required for transfer of antherozoids - the male gametes released from the male sex organ to the mouth of female sex organ. Fusion of male gamete with the egg result in the formation of zygote. Zygote thereafter produces a multicellular well-differentiated sporophyte. In majority of the pteridophytes all the spores are of similar kinds. However, some genera also produce two kinds of spores, macro (larg e) and micro (small) spores. The megaspores and microspores germinate and give rise to female and male gametophytes, respectively. In these plants, the female gametophytes are retained on the parent sporophytes for variable periods. The development of the zygotes develop into young embryos within the female gametophytes. This event is a precursor to the seed habit considered an important step in evolution.Q. The gametophytes are called as________.

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A self-fertilizing trihybrid plant forms[2004]a)8 different gametes and 64 different zygotesb)4 different gametes and 16 different zygotesc)8 different gametes and 16 different zygotesd)8 different gametes and 32 different zygotesCorrect answer is option 'A'. Can you explain this answer?
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A self-fertilizing trihybrid plant forms[2004]a)8 different gametes and 64 different zygotesb)4 different gametes and 16 different zygotesc)8 different gametes and 16 different zygotesd)8 different gametes and 32 different zygotesCorrect answer is option 'A'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A self-fertilizing trihybrid plant forms[2004]a)8 different gametes and 64 different zygotesb)4 different gametes and 16 different zygotesc)8 different gametes and 16 different zygotesd)8 different gametes and 32 different zygotesCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A self-fertilizing trihybrid plant forms[2004]a)8 different gametes and 64 different zygotesb)4 different gametes and 16 different zygotesc)8 different gametes and 16 different zygotesd)8 different gametes and 32 different zygotesCorrect answer is option 'A'. Can you explain this answer?.
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