Genetics Questions

An individual with 2 different alleles of the same gene

Proportion of individuals carrying a particular variant of a gene that also express an associated phenotype.

The description of how an animal should look and behave

The separation of the 2 alleles of a gene into different gametes

(the picture on the study guide) what are hydrogen bonds?

reproductive cells containing only one copy of each gene

The heritability entity that determines the characteristic

A cross between individuals both homozygous for 2 genes

The cross of an individual of ambiguous genotype with a homozygous recessive individual

The allele that does not contribute to the phenotype of the heterozygote

F. Post transcriptional RNA modifications include1). Addition of 7 methyl guanosine cap2). Addition of Poly A tail to a primary transcript3). Splicing of introns4). recruitment of tRNA.

H. AaBb x aabb is an illustration of a 1). monohybrid cross2). Dihybrid cross3). Test cross4). multiple cross

Xeroderma pigmentosum in humans is controlled by a single autosomal gene. DD individuals are normal, Dd individuals have freckled skin, and dd individuals have freckled skin (especially the face) that ulcerates when exposed to UV light. The result is cancer in these areas, which is fatal to these individuals before reproductive age.

J. Stop codons include the following EXCEPT1). UAA2). UAU3). UGA4). UAG

The phenotypic effect of a gene at one locus is dependent on what allele is present at another locus

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.

An allele in horses gives rise to the overo coat color pattern, which involves white primarily on rental surfaces of the horse. Homozygosity for the overo allele results in all white foals that suffer from aganglionosis of the large intestine and die within a few days of birth.

I. Benefits of alternative splicing includes1). decrease the chance for exon shuffling through recombination.2). generates different proteins from single gene3). increases gene expression4). increases the length of the transcript

A situation where heterozygotes is a superior to both homozygotes in performance or disease resistance.

The 3 consecutive bases on the mRNA is a codon that specifies an amino acid. There are 64 codons in total and they code for the 20 amino acids.