Evolution is the
1 answer:
Answer:
Evolution is the <u>biological process</u> that happens over time in a population, giving rise to new <u>species.</u> The theory of evolution states that all organisms alive on Earth today <u>have a common ancestor</u> which lived <u>years ago</u>.
Explanation:
Evolution is one of the fundamental reason of diverse life on Earth today. Principally, this process takes place by changes in genetic elements via mutations and crossing-over. The positive changes (mutations) allow the organism to develop better condition in order to survive in changing environmment. However, if the changes takes place at major scale, it also leads to the creation/development of new species. To explain this further, I have added a photograph where we can see how different organisms were evolved in the history of Earth.
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Answer:
i) Genotype of Parent 1= TTpp
Genotype of Parent 2= ttPP
ii) The genotypes of their gametes
Parent 1= Tp
Parent 2= tP
iii) F1 generation = All TtPp (tall and purple flower)
iv) F2 phenotype ratio= 9 tall, purple: 3 tall, white: 3 dwarf, purple : 1 dwarf, white.
F2 Genotype ratio= 1:2:1:2:4:2:1:2:1
Explanation:
Let's assume that allele "T" gives tall plants while allele "t" imparts dwarfism. Likewise, the dominant allele "P" is responsible for purple flowers while recessive allele "p" gives white flowers.
i) Genotype of Parent 1—Tall plant with white flowers (pure breeding)= TTpp
Genotype of Parent 2—Dwarf plant with purple flowers (pure breeding)= ttPP
ii) The genotypes of their gametes
Parent 1= Tp
Parent 2= tP
iii) F1 generation = All TtPp (tall and purple flower)
iv) Each of the F1 plant with TtPp genotype will form four types of gametes= TP, Tp, tP and tP
A cross between TtPp x TtPp gives F2 progeny in following ratio=
F2 generation phenotype ratio= 9 tall, purple: 3 tall, white: 3 dwarf, purple : 1 dwarf, white.
Genotype ratio= 1:2:1:2:4:2:1:2:1
