Biology: how to find the phenotype frequency

how to find the phenotype frequency, №8757411, 24.07.2020 13:19

Chemistry

Genotypes and Phenotypes Before You Begin: You may either copy and paste this document into a word processing program of your choice or print this page. Items Needed: One coin Directions: Flip a coin 2 times for each trait investigated in the worksheet. If the coin lands on heads, record a capital letter if the coin lands on tails, record a lowercase letter. The capital letters will represent a dominant allele; the lowercase letters will represent a recessive allele. Check the Genotype/Phenotype Key to determine what trait your individual will

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P Answered by PhD

I don’t really know this but I think

Chemistry

Genotypes and Phenotypes Before You Begin: You may either copy and paste this document into a word processing program of your choice or print this page. Items Needed: One coin Directions: Flip a coin 2 times for each trait investigated in the worksheet. If the coin lands on heads, record a capital letter if the coin lands on tails, record a lowercase letter. The capital letters will represent a dominant allele; the lowercase letters will represent a recessive allele. Check the Genotype/Phenotype Key to determine what trait your individual will

Step-by-step answer

P Answered by PhD

I don’t really know this but I think

Biology

Which of the following statements about phenotypes and genotypes is false? A.)Phenotype can be changed by the environment, B.)Genotype affects phenotype by providing the instructions for making proteins. C.)Phenotype is an organism s visible characteristics. D.)An organism s phenotype is only made up of genes and alleles.

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P Answered by Specialist

57

D

Explanation:

Phenotypes are your physical traits and they can be altered by the environment. Your genotype is your genes and genetic code. This cannot be altered and is the instructions for making proteins.

Biology

Which of the following statements about phenotypes and genotypes is false? A.)Phenotype can be changed by the environment, B.)Genotype affects phenotype by providing the instructions for making proteins. C.)Phenotype is an organism s visible characteristics. D.)An organism s phenotype is only made up of genes and alleles.

Step-by-step answer

P Answered by Master

57

D

Explanation:

Phenotypes are your physical traits and they can be altered by the environment. Your genotype is your genes and genetic code. This cannot be altered and is the instructions for making proteins.

Biology

Students in a class are studying patterns of inheritance using genes involved in determining the body color and wing shape of Drosophila flies. Each of the genes has only two alleles, one of which is completely dominant to the other. Each student in the class performed a parental cross between a fly that is true-breeding for ebony body and vestigial wings and a fly that is true-breeding for gray body and long wings. Each student then crossed several pairs of the F1 flies and determined the phenotypes of 500 of the resulting F2 flies with respect

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P Answered by PhD

Therefore, the variation of these genes and characters is because of these variations.

Mathematics

Dr. Beadle conducted an experiment to determine how many genes control the differences between maize and teosinte. He crossed teosinte with maize (the two parental plants) to produce F1 hybirds, and then crossed the F1 plants to produce an F2 generation (offspring). He then looked at the appearance, or phenotype of the offspring. Based on classical genetics, he predicted if just one gene was responsible for all the differences between maize and teosinte, a parental phenotype was expected in one of every four offspring—in other words ¼ of the offspring

Step-by-step answer

P Answered by Specialist

6

Step-by-step explanation:

A. In the equation, the n represents the no. of genes involved. If n =1, a single gene is responsible, then X= (1/4)^1= 1/4 offsprings will be of one parental type.

B. Out of 50,000 plants, 1 out of 500 had maize phenotype and another 1 out of 500 terosinte phenotype.

So 1 in 500 so how much in 50000?

1*50000/500 = 100.

100 plants are of terosinte and 100 are of maize phenotype. The rest plants have recombinant phenotype. The exact phenotypes cannot be told from the given information.

C. According to formula, if 2 genes are involved, then 1 in 16 will be of one parental type. If genes 4 are involved, then 1 in 4^4= 1 in 256 will be of one parental type. If 5 genes are involved then it will be 1 in 512 plants will be of parental type. On the question, every 1 in 500 plants have one parental type. Hence Dr.Beadle concluded that 4 or 5 genes are involved in the phenotypic difference.

D. Genes code for all physical characteristics of an organism. Changes to genetic material can result in far reaching consequences in one or more particular metabolic pathways, this results in different phenotype compared to parents. Genes can mask other genes effect, complement it, or supplement it resulting in diverse response. The genes can also act in additive manner called quantitative genetics. Certain gene upon expression can block other genes expression, called epistasis. Such diverse mechanism can result in very different looking plants even with changes in small number of genes.

Biology

The students performed a second cross the parental cross was between Nies that are true breeding for gray bodies and long wings and flies that are true breeding for ebony bodies and curly wings. They crossed pairs of F,fies and determined the phenotypes of the resulting F ies. The students found an approximate 3:1 ratio of this with the dominant phenotype (gray bodies and long wings) to ties with the recessive phenotype (ebony bodies and curly wings) only a few of the flies expressed the dominant phenotype of one trait and the recessive phenotype

Step-by-step answer

P Answered by PhD

See the answer below.

Explanation:

Fertilization contributes to genetic variability through random fusion of male and female gametes.

Gametes are generated during the process of meiotic cell division. Male gametes are generated through spermatogenesis while female gametes are generated through oogenesis.

The male gamete contains haploid paternal chromosome while the female gamete contains haploid maternal chromosome.

During fertilization, each parent is able to contribute a unique set of the haploid chromosome to form a diploid zygote. This process of gene shuffling and random fusion results in more genetically variable offspring.

Mathematics

Dr. Beadle conducted an experiment to determine how many genes control the differences between maize and teosinte. He crossed teosinte with maize (the two parental plants) to produce F1 hybirds, and then crossed the F1 plants to produce an F2 generation (offspring). He then looked at the appearance, or phenotype of the offspring. Based on classical genetics, he predicted if just one gene was responsible for all the differences between maize and teosinte, a parental phenotype was expected in one of every four offspring—in other words ¼ of the offspring

Step-by-step answer

P Answered by Specialist

6

Step-by-step explanation:

A. In the equation, the n represents the no. of genes involved. If n =1, a single gene is responsible, then X= (1/4)^1= 1/4 offsprings will be of one parental type.

B. Out of 50,000 plants, 1 out of 500 had maize phenotype and another 1 out of 500 terosinte phenotype.

So 1 in 500 so how much in 50000?

1*50000/500 = 100.

100 plants are of terosinte and 100 are of maize phenotype. The rest plants have recombinant phenotype. The exact phenotypes cannot be told from the given information.

C. According to formula, if 2 genes are involved, then 1 in 16 will be of one parental type. If genes 4 are involved, then 1 in 4^4= 1 in 256 will be of one parental type. If 5 genes are involved then it will be 1 in 512 plants will be of parental type. On the question, every 1 in 500 plants have one parental type. Hence Dr.Beadle concluded that 4 or 5 genes are involved in the phenotypic difference.

D. Genes code for all physical characteristics of an organism. Changes to genetic material can result in far reaching consequences in one or more particular metabolic pathways, this results in different phenotype compared to parents. Genes can mask other genes effect, complement it, or supplement it resulting in diverse response. The genes can also act in additive manner called quantitative genetics. Certain gene upon expression can block other genes expression, called epistasis. Such diverse mechanism can result in very different looking plants even with changes in small number of genes.

Biology

The students performed a second cross the parental cross was between Nies that are true breeding for gray bodies and long wings and flies that are true breeding for ebony bodies and curly wings. They crossed pairs of F,fies and determined the phenotypes of the resulting F ies. The students found an approximate 3:1 ratio of this with the dominant phenotype (gray bodies and long wings) to ties with the recessive phenotype (ebony bodies and curly wings) only a few of the flies expressed the dominant phenotype of one trait and the recessive phenotype

Step-by-step answer

P Answered by PhD

See the answer below.

Explanation:

Fertilization contributes to genetic variability through random fusion of male and female gametes.

Gametes are generated during the process of meiotic cell division. Male gametes are generated through spermatogenesis while female gametes are generated through oogenesis.

The male gamete contains haploid paternal chromosome while the female gamete contains haploid maternal chromosome.

During fertilization, each parent is able to contribute a unique set of the haploid chromosome to form a diploid zygote. This process of gene shuffling and random fusion results in more genetically variable offspring.

Biology

Which equation describes the interaction between phenotype, genotype, and the environment? A.) genotype- environment= phenotype B.) genotype+ environment= phenotype C.)phenotype+genotype= environment D.)phenotype+ environment= genotype

Step-by-step answer

P Answered by PhD

option B:is correct answer

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