Genetics Questions

Parents with normal vision (not color blind) produce daughters that have normal vision, but if the dam is a carrier, half of the sons will be color blind.

A. DNA1). Is composed of ribose, phosphate, nucleotide bases and strong hydrogen bonds2). Is composed of 2 parallel chains bound together by strong sugar phosphate bonds3). Is a polymer of nucleotide units bound together, end to end by weak hydrogen bonds4). Replicates prior to cell division.

G. What is the role of tRNA during translation1). Bond to open the DNA strand to carry the code for protein synthesis out of the nucleus.2). Carry ribosomes to the site of protein synthesis3). break apart mRNA and send it back to the nucleus so that it can be reused4). Carry amino acids to the mRNA for correct placement into the protein chain.

A relatively common form of congenital heart disease, conational spectrum defects, is found in keeshonds and can be divided into 4 different grades of increasing scarcity.

Traits that are governed by genes on the autosomes and can only be expressed in one sex due to anatomical differences and have no penetrance or simply turned off in the other sex.

B. Meiosis1). Meiosis II consists of division of haploid cells2). Meiosis I consists of separation of sister chromatids3). Daughter cells end up with the same number of chromosomes as the parent cell4). In the male, the result is 4 functional sperm cells.

C. RNA1). Codes for DNA2). tRNA is used as a template for protein synthesis.3). mRNA carries the genetic information from DNA4). Is involved in both transcription and translation.

15. A wild-type allele isA. the most common allele for a gene in a population.B. expressed in the heterozygous state.C. expressed only in the homozygous state.D. always beneficial to the organism.E. always completely dominan

D. Gene Linkage1). Condition where allelic gene pairs consistently travel together through meiosis and syngamy2). The probability of recombination of genes at any 2 loci depends on the distance between homologous pairs3). Crossing over involves the reciprocal exchange of chromosomes segments between homologs and may disrupt the linkage of 2 genes4). Recombination involves new allelic pairings of genes.

MCAT Question: In Labrador retrievers, the allele for black coat color (B) is dominant to the allele for brown coat color (b). However, if a lab has two copies of the recessive allele for a pigment-depositing gene (e), it can only have yellow coat color. In a cross of two doubly heterozygous black labs (BbEe x BbEe), what fraction of the next generation would one expect to be yellow

If the affected male in generation III were to reproduce with an unaffected female who is not a carrier for the condition, what is the probability they will have an affected child? Draw a Punnett square to help answer this question once you figure out the genotypes and gametes produced by the individuals described. See pedigree in canvas (question 4)A. 75%B. 50%C. 25%D. 0%

E. DNA polymerase1). Synthesize mRNA in the 3' to 5' direction2). Synthesize DNA in the 5' to 3' direction.3). Synthesize mRNA in the 5' to 3' direction4). Synthesize DNA in the 3' to 5' direction.

Q4 LG 16 - Calculate recombination frequency

n maize (corn) plants, a dominant allele I inhibits kernel color, while the recessive allele i permits color when homozygous. At a different locus, the dominant allele B causes blue kernel color, while the homozygous recessive genotype bb causes red kernels. If plants heterozygous at both loci are crossed, what will be the phenotypic ratio of the offspring?

6. A man with hemophilia has a daughter without hemophilia who reproduces with a man without hemophilia. What is the probability of their daughter having hemophilia? Their son? If they have four sons, what is the probability that all will be affected?

6. Assume that a cross is made between AaBb and aabb plants and all of the offspring are either AaBb or aabb. These results are consistent with which of the following:A. complete linkageB. codominanceC. incomplete dominanceD. independent assortment

What animal does X inactivation occur in?

The distance between the shrunken (s) and bronze (b) genes is 2 map units. The distance from the shrunken gene to the yellow gene (B) is 22 m.u., while the distance from bronze to the same gene is 24 m.u. What is the order of these three genes? A. s - B - b B. s - b - BC. b - s - B

Leading strand nucleotide addition is?

Which homozygous parent stocks could be used to produce the heterozygous females used in the cross described above?A. wild type eye color, wild type body color X mahogany eyes, wild type body colorB. wild type eye color, wild type body color X mahogany eyes, ebony body colorC. wild type eye color, ebony body color X mahogany eyes, wild type body colorD. wild type eye color, ebony body color X mahogany eyes, ebony body color