Answer:
There are four forces of evolution: mutation, gene flow, genetic drift, and natural selection. Mutation creates new genetic variation in a gene pool. Gene flow and genetic drift alter allele frequencies in a gene pool.
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Answer:
Volcanic emission
Explanation:
Volcanoes can impact climate change. During major explosive eruptions huge amounts of volcanic gas, aerosol droplets, and ash are injected into the stratosphere. ... But volcanic gases like sulfur dioxide can cause global cooling, while volcanic carbon dioxide, a greenhouse gas, has the potential to promote global warming.
Answer: Phenotype ratio is two heterozygous round pea : two homozygous wrinkled pea
Probability of getting a wrinkled pea is 1/2
The number of flowers that are homozygous is 2
The probability of getting a round pea is 1/2
Genotype ratio = 2 Rr : 2 rr
Explanation: From the information provided, round pea R is dominant while wrinkled pea r is recessive. A monohybrid cross between a heterozygous round pea Rr and a homozygous wrinkled pea rr will produce four offsprings, two of which are heterozygous round pea Rr and the other two are homozygous wrinkled pea rr.
The genotype ratio is 2 Rr : 2 rr while the phenotype ratio is two heterozygous round pea : two homozygous wrinkled pea. Heterozygous round (Rr) peas will manifest outwardly as round pea because R is dominant while r is recessive.
Since two out of the four offsprings are homozygous wrinkled pea, therefore the probability of getting a wrinkled pea is 2/4 = 1/2. Also, two out of the four offsprings are heterozygous round pea, therefore the probability of getting a round pea is 2/4 =1/2.
Since, only the two wrinkled peas are homozygous, therefore the number of flowers that are homozygous is 2
Answer:
The correct answr is - A. Part of one chromosome attached to another chromosome.
Explanation:
Translocation is one of the chromosome abnormality that cause change in the number of the chromosome. In the translocation a part of the chromosome breaks off and bind or attached to the another chromosome.
The translocation cause various disorderes in individual one of them is Down syndrome which is the result of the alteration of chromosome number 21. In this translocation or specicifically the chromosome portion of chroromosme 14 breaks off and reattaches to the chromosome 21 result in one normal 14 and two normal 21 chromosme so there is trisomy occurs.