Question 7 0.33333 out of 1 points One species of flower forms tetraploid hybrid

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Question 7 0.33333 out of 1 points One species of flower forms tetraploid hybrid offspring with another species of flower. These new tetraploid individuals can mate amongst themselves and produce fertile viable offspring. The following generations are fertile and viable as well. However, the tetraploid individuals cannot successfully cross with either of their diploid parents because those pairings only produce small seeds that die immediately after germination. This is an example of [x] speciation due an [y] event and reinforced by a [z] reproductive barrier. Selected One species of flower forms tetraploid hybrid offspring with another species of flower. These new tetraploid individuals can mate amongst themselves and produce fertile Answer viableoffspring. The following generations are fertile and viable as well. However, the tetraploid individuals cannot successfully cross with either of their diploid parents because those pairings only produce small seeds that die immediately after germination. This is an example of sympatric speciation due an autopolyploidy event and reinforced by a allopatric reproductive barrier. Answers . autopolyploidy . allopolyploidy . sympatric behavioral isolation . gametic isolation . hybrid inviability . allopatric . dispersal

Explanation / Answer

Question 7:

Sympatric speciation: It is defined as the process of speciation where the formation of two or more new species occurs that are not geographically isolated but are isolated reproductively. This type of speciation mostly occurs through polyploidy.

Polyploidy: The doubling of chromosomes is known as polyploidy. There are two types of polyploidy i.e. autopolyploidy and allopolyploidy. Allopolyploidy is defined as a process when an organism possesses two or more sets of chromosomes which are obtained from two different species, resulting in the formation of a different species (speciation).

Hybrid inviability: It is a kind of zygotic barrier that diminishes an individual’s chances to mature into a healthy individual.

Therefore, the correct options will be in series as Sympatric speciation, allopolyploidy, and hybrid inviability.

This is an example of sympatric speciation due to Sympatric speciation and reinforced by a hybrid inviability reproductive barrier.

Question 4:

A group of individuals having common attributes and designated by a common name which is potentially capable of interbreeding and produces viable offsprings. The individuals of a species cannot breed with other groups, thus have reproductive isolation and thus can not produce viable offsprings.

Therefore, the correct options are:

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