Biology help needed fast and get ten points only if it is fast and correct?

1. A trait controlled by four alleles is said to have _____.





A.homologous alleles





B.autosomes





C.hybridization





D.multiple alleles





2. The 23rd pair of chromosomes that differ in males and females are called _____.





A.autosomes





B.sex chromosomes





C.multiple alleles





D.polygenes





3. When roan cattle are mated, 25% of the offspring are red, 50% are roan, and 25% are white. Upon examination, it can be seen that the coat of a roan cow consists of both red and white hairs. This trait is one controlled by _____.





A.multiple alleles





B.codominant alleles





C.sex-linked genes





D.polygenic inheritance





Please only the people that know biology really well. Please NO GUESSING for the two points because then no one will get best answer if you ruin for yourself and the people that are guessing. I will be able to know the answer in 5 minutes not just by you guess but I have to submit the to MY teacher and I will get the answers back right away. I'm just not sure on these ones. so NO GUESSI

Biology help needed fast and get ten points only if it is fast and correct?
1) Twinkies.





2) The Loch Ness Monster.





3) 5.67 x 10^78 (This is rounded down.)
Reply:1. I was right when I said Multiple alleles (I checked it out in my text book)


2. Sex chromosomes for sure. In males it's XY and in females, XX. In transvestites I think it's XXY.


3. Must be codominant alleles, like you know, the IAIB allele that is for the AB blood group in humans, which is a heterozygus allele.
Reply:D


B


B
Reply:1)multiple alleles-it has more than two alleles controlling a single trait





2)sex chromosomes-they are a pair,XX in females,XY in males





3)Co-dominant alleles-since the phenotypic outcome shows both white as well as red hair,so both the alleles act as co-dominant alleles.
Reply:1. D, multiple alleles is like 3 or more alleles present for a trait





2. B, it tells whether u got the xx or xy chromosomes, male or female





3. B, codominant is when the dominant allele partially covers the effect of the recessive allele giving a mixed color.