GENETICS
parents : a female white eye, yellow body fly

Is crossed with a

Ebony body, red eye male fly

The F1 genotype for the female should be red eyes and yellow body

And the F1 genotype for the male would be white eyes and yellow body

What would the F2 cross look like? The ratio of

Red eyes, yellow body

White eyes and yellow body

Red eyes and ebony body

White eyes and ebony body

And also include the ratio of Females to males for each phenotype

Note that you must know which allele is x linked, recessive and double recessive for the question

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Trinidad TremblayLv2

29 Dec 2018

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Related questions

In Drosophila, bodies can be ebony colored (e), double wings canbe produced (d), and eyes can be red (r). These three genes arelinked on the same chromosome. Females from a pure-breeding ebonybodies, double winged, and red eyes are crossed with males from awild type stock. The F1 are wild type for all three traits. The F1females are then crossed with males that are ebony bodied, doublewinged, and red eyed.

double wing, red eye	76
wild	350
ebony body	81
double wing	82
ebony body, red eye	77
ebony body, double wing, red eye	330
red eye	4

a) Construct a chromosomal map with the correct gene order anddistance between each pair of genes.

b) What are the genotypes (in correct gene order) for theoriginal parents?

c) What are the genotypes (in correct gene order) for the F1individuals?

copperhare254

(These questions are regarding Drosophilla (fruit flies)) Red eye is dominant, Brown body is dominant (Please denote red eyes as Xw+, white eyes as Xw, Brown body as B, and black body as b)

If I start off with Parental generation of Red Eye Black Body Males and cross them with White Eyed Brown Body Females, what will my F1 offspring look like? Then if I cross the F1 offspring what will their offspring, the F2 generation, look like? Please give me the phenotypic ratios along with the dihybrid crosses.

If I start offf with Parental generation of White Eye Brown Body Male and cross them with Red Eyed Black Body Females, what will my F1 offspring look like? Then if I cross the F1 offspring what will their offspring, the F2 generation, look like? Please give me the phenotypic ratios along with the dihybrid crosses.

azurekangaroo41

ou are experimenting with the mutation in fruit flies that causes the white eye phenotype. You are predicting this gene is recessive and linked on the X chromosome. If you have a P generation that consists of a male with white eyes and mate this with a female that has red eyes. The F1 generation all have red eyes. These F1 flies are allowed to mate with each other and you collect the offspring. If you collect 60 male flies, how many of these males would you predict have white eyes? Enter an expected number of male flies, not a percentage. Assume equal survival of red- and white-eye fly embryos.