Hello, I am stumped hope you can help:) Here is my question....A rabbit, homozygous reccssive for long fur (ss) produces a liter of 8 bunnies. Four of the bunnies have short fur and four are long furred. Set up a Punnets square to determine the genotype of the father.
Can't wait to hear from you:) Hopefully sooner than later, thanks in advance, I apprecaite your insight:)
2006-12-03 05:55:19 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Biology
S S
____
s|Ss|Ss|
s|Ss|Ss|
okay, i hope you know what i mean
2006-12-03 06:03:18 · answer #1 · answered by ♪寿司人♫ 3 · 0⤊ 0⤋
If the mother is homozygous recessive for a trait (ss) and the offspring consist of both the dominant trait and the recessive trait (in this case both short fur and long fur), then the father must be heterozygous (Ss)
Think of it this way: The father must be either SS, ss, or Ss. If the father was SS, then all the offspring would show the dominant trait (short hair) because the father must donate the dominant allele. Likewise, if the father was ss, then all the offspring would show the recessive trait (long fur) because both the mother and father must donate the recessive s allele. Therefore, the only other possible genotype of the father must be Ss because the offspring have both the dominant and recessive trait.
2006-12-03 06:06:19 · answer #2 · answered by NW 2 · 0⤊ 0⤋
Ok, I do this stuff for a lot of my classes, being a senior genetics major and all so here we go . . .
so long fur is ----> ss (homozygous recesive)
since there are bunnies that have long hair, the father must has at least one small s (remember each parent gives one allel). Also, since there are some bunnies with short hair, the father must also have a large S. Therefore, the father must be Ss.
2006-12-03 07:10:02 · answer #3 · answered by Science nerd 3 · 0⤊ 0⤋
The other parent would be heterozygous (Ss).
Female: s, s
Male: S, s
Ss (#1 baby) Ss (#2 baby)
ss (#3 baby) ss (#4 baby)
Since the pair of rabbits had 8 offspring, the 4-square punnet square just needs to be doubled.
This is for SIMPLE crosses. If there was another gene you didn't list or mention, it will complicate it a little more.
2006-12-03 06:07:04 · answer #4 · answered by MDG 2 · 0⤊ 0⤋
i just learned that stuff.
i think the mother is ss, and the father is SS. two of the rabbits are...wait, yeah i lost myself. i never pay attention in science.
2006-12-03 06:08:05 · answer #5 · answered by Aleahgirl31548 2 · 0⤊ 0⤋
Father rabbit: Ss
Mother rabbit: ss
Square:
S s
------------
s| Ss ss
s| Ss ss
2006-12-03 06:04:38 · answer #6 · answered by Halcyon 4 · 0⤊ 0⤋
i dont remeber this stuff i learned it in 7th grade sorry
2006-12-03 06:03:53 · answer #7 · answered by Anonymous · 0⤊ 0⤋