Question

Help on all questions, please. Genetics help. VGL problem. All information about problem has been given

Cage 3 Parents Ô (Cage 1) Blue-Eye X (Cage 1) Green-Eye rOffspring- Organisms Count Images 0000000 000 200000 130 Green 0000000 130 Oooooo 000 Eye Blue What is surprising about the offspring, that makes you think this must not just be a simple autosomal dominant/recessive? (1points) Is this cross consistent with the trait being determined by a Y-linked gene? Why or why not? (2points) Is this cross consistent with the trait being determined by a mitochondrial gene? Why or why not? (2points) Is this cross consistent with a trait being determined by an X-linked recessive case? Why or why not? (2points) Is this cross consistent with a trait being determined by an W-linked gene? Why or why not?|| (2points)

Answer 1

1. Blue is only shown by female progenies and green with only male progenies , clearly showing this is a sex limited trait. If it were autosomal then both sex must show the trait ie, females and males must show both blue and green character.
2. Yes. This cross consistent with the trait being determined by a Y- Linked gene. For only males to be affected the trait must be linked with y gene as females lack y gene they can't show the trait that is linked only with y gene.
3. no. This cross is not consistent with the trait being determined by mitochondrial gene. Mitochondrial gene can only be transmitted by mothers, but mothers can transmit to both male and female progenies.
4. Yes. This cross is consistent with the trait being deterimined by X linked recessive gene. Recessive character will only get expressed in homozygous condition which is present only in females and not in males.

( by ours rules we can only answer 4 questions maximum at a time. for the answer of the rest repost those questions;)