Biology Homework Solutions

Find the protein that the nucleotide sequence codes for using a Blast internet search.

Find the protein that the following nucleotide sequence codes for: atgccatcct taaacaacac tgcagtgatg gatttcattc ttgtgggact cacagacagc Use the Blast website by cutting and pasting the nucleotide sequence http://www.ncbi.nih.gov/BLAST/ tutorial at http://www.ncbi.nlm.nih.gov/Education/BLASTinfo/information3.html

Understanding BRCA genes, related to human breast cancer.

Using the NCBI website resources find information related to BRCA genes, related to human breast cancers. Use "locus link" at http://www.ncbi.nlm.nih.gov/ (Tutorials are available if you get stuck) 1) find the chromosomal position of the BRCA-1 gene 2) what is another gene located next to BRCA-1 at this chromosome 3 ...continues

The arrangement of genes in a chromosome via inversions, duplications, deletions, insertions, and translocations.

A chromosome has eight alleles in the order ABCDEFGH. Which of the following represents an inversion? ABBCDEFGH ABEDCTFG ABCDGH ABCDEEFFGH ABCDFGH

Understanding the universal nature of the Genetic Code.

The nearly universal nature of the genetic code supports the view that: All living organisms share a common ancestor Nucleic acids were the first living things Proteins are a secondary importance of living systems The protein composites of all living organisms is the same There is redundancy in the genetic code

Mendelian Genetics, Punnet squares

You cross an aa bb mutant plant with an AA BB wild type. What would the F2 segregation ratio be (wild type to mutant) if: a.) both mutations, a and b, were recessive? b.) both mutations were dominant? c.) one mutation was dominant and one recessive? (assume both mutations are required for the mutant phenotype) (assume t ...continues

Mendelian Genetics

"a" is a dominant mutant allele of the A gene, and "b" is the recessive mutant allele of the B gene. To see the mutant phenotype, one requires either an "a" mutant phenotype or a "b" mutant phenotype (both mutations are not necessary). What would the F2 segregation ratio be (wild type to mutant) of the cross of an aabb mutant ...continues

Double Cross-overs

Hi. Can you help me with the following genetics problem, please: "Consider a pair of homologous chromosomes heterozygous for three genes (e.g., ABC/abc) during prophase I of meiosis. Let the sister chromatids of one homolog be numbered 1 and 2 (ABC); and the sister chromatids of the other homolog be numbered 3 and 4 (abc). ...continues

Genetics--map units

Hi. Here's the problem: In Zebrafish, 3 genes have been mapped on the third chromosome, in the order fiz--6 m.u.---myob----14 m.u.-------sufi The wild-type allele of each gene is dominant. A strain that is fiz myob sufi/+++ is testcrossed, and there are 1000 offspring fish. 1. How many fiz ...continues

Genetics -- map units

EDIT to the problem below: I just realized that the various numbers of offspring add up to 9900, not 10,000, which is the supposed total. So for problem #2, I randomly added 100 to my recombinant numbers and got the answer, 30.1, which turned out to be correct. But the same thing did not work for problem #1. Adding 100 to the ...continues

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