07 A Gene Interaction in Genetics

Flashcards covering key concepts and definitions related to gene interactions as discussed in the lecture.

The purpose of a complementation test is to determine if mutations are in the __ gene.

same gene.

If both mutations do complement each other in a complementation test, then they are __ of different genes.

alleles.

In a genetic cross, if the F1 generation develops wings, it indicates that the mutations are in __ genes.

separate.

The gene interaction that leads to a 9:7 phenotypic ratio indicates that __ genes are interacting.

two.

In the example of Haravels flowers, a complementation test shows the two mutations are in __ genes because the flowers produce a wild type phenotype.

different.

The enzyme involved in converting precursor one in flowers is produced by __ gene.

gene A.

If either gene A or gene B is mutated, the flower will remain __ instead of turning blue.

white.

The phenotypic ratio of a typical Dihybrid cross is __.

9:3:3:1.

In duplicate gene interaction, either allele of the genes can produce a __ phenotype.

purple.

The phenotypic ratio for dominant gene interaction is __.

15:1.

In the squash fruit shape example, possessing one or two dominant alleles leads to __ shapes.

round.

For recessive epistasis, the phenotypic ratio observed is __.

9:3:4.

The ratio of 12:3:1 in dominant epistasis shows that a dominant allele of one gene can mask the expression of another __.

allele.

The dominant suppression leads to a phenotypic ratio of __ in chickens.

13:3.

To determine gene interactions, one must first find two mutants that affect the same __.

phenotype.

The wild type phenotype of blue flowers requires the products of gene W and __.

gene M.

If both genes W and M are mutated, the resulting color will be __.

magenta.

In the case of lethal alleles, an example in mice is the dominant __ allele that causes embryonic lethality.

agouti.

In the genetic model for the coat color in Labrador retrievers, the presence of __ determines if the offspring will be black, brown, or golden.

different alleles.

A classic case of pleiotropy can be seen in individuals with __, affecting multiple phenotypes.

sickle cell anemia.

If an organism is homozygous recessive for the agouti allele, it will not survive due to its __.

embryonic lethality.

If you obtain unexpected ratios in a genetic cross, it suggests that __ are likely interacting.

genes.

In dominant epistasis, the dominance of one gene can suppress another gene's __ expression.

dominant.

The cross that results in different phenotypic ratios indicates the complexity of __ interactions.

gene.

If you cross a wild type flower with a mutant and get a wild type flower, you can conclude the mutations are in __ genes.

different.

A typical Mendelian ratio is __ indicating no gene interactions in the observed traits.

9:3:3:1.