Question

8. Consider the cage shown below. Cage 4 Parents (Cage 1) Four-Antenna X (Cage 1) Five-Antenna Offspring Antenna Organisms Count Images 0000000000 190 ooo000000 002 0000000000000 Four 000 13 What is surprising about the offspring, that makes you think this must not just be a simple autosomal dominant/recessive? (I points) 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? (2 points) Is this cross consistent with a trait being determined by an X-linked recessive case? Why or wh not? (2points) Is this cross consistent with a trait being determined by an W-linked gene? Why or why not? (2 points)

Answer 1

TITIA 6 It must not just be a simple autosome linked Inheritance because there is a sex specific phenotype being obsesved in the F1 - all males have 5 antennae Whitel all females hare 4 antennae. 2 No. It that were the case of Date an m ous antenna @ male parent should have borne a pals on his y chromosomes to his sons but that is i la nost arestato chondrial gene is inherited from ones mother not the case o nie lence all Fas should have been five antenna ones. Uramblemine 20 Hat th Hot T

A Yes say Parents were Xay x taya (4-anterna) (5-antenna) e 21 = xĀya (-antenna) = x^ (s-aFee). 6 No. W will be passed from mothers to daughters only and hence the 5- antenna fernale parent should have bosne o all 5-antenmae daughters which is not the case.