In some genetically engineered corn plants, a Bt gene was inserted into a chromosome. The Bt gene specifies a protein called Bt that is lethal to certain flying insect pests that eat the corn plants. If the corn plant is heterozygous for the Bt gene (one homolog has the introduced Bt gene and the other does not), what proportion of the sperm would carry the Bt gene? Is the presence of the Bt gene (a mutation) dominant or recessive to its absence (the wild type)? A) all pollen; dominant B) 1/2; dominant C) 1/3; recessive D) 1/4; dominant E) 1/8; recessive (Explain your answer)
In some genetically engineered corn plants, a Bt gene was inserted into a chromosome. The Bt gene specifies a protein called Bt that is lethal to certain flying insect pests that eat the corn plants. If the corn plant is heterozygous for the Bt gene (one homolog has the introduced Bt gene and the other does not), what proportion of the sperm would carry the Bt gene? Is the presence of the Bt gene (a mutation) dominant or recessive to its absence (the wild type)?
A) all pollen; dominant
B) 1/2; dominant
C) 1/3; recessive
D) 1/4; dominant
E) 1/8; recessive
(Explain your answer)
INTRODUCTION
The genetically modified organisms in Bt corn are mainly called GMOs. In the molecular technological purposes the Genetically modified plant or animal, al may be occupied in the genetic material from other small organisms. Genetically modified crops are Bt-potatoes, Bt-corn, Bt-sweet corn, Roundup Ready soybeans. Genetically modified crops are mainly obtained from Genetically modified food. Genetically engineered crops are mainly obtained by Bacillus thuringiensis (Bt) it will be synthesized in the bacterial toxins. Bt crops are mainly used in corn, cotton, potato, and tobacco. Some Bt strains are formed in the Cry toxins and they will segregate from the crystals. Such cry toxins are synthesized from the insects belonging to orders such as Lepidoptera, Coleoptera, Hymenoptera, Diptera, and also Nematoda. In certain pesticides, the genes from the Bt can be mainly inserted into the crop plants to produce insecticidal toxins and it will be resistant to more important pests.
ANSWER
Correct Answer: In the Bt genes the corn plants are heterozygous it can be introduced to the Bt gene and the proportion of sperm would carry the BT gene is1\2.The presence of the Bt gene is Dominant.
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