Biology - March 2007

when i finish doing a punit square how do i determain the percentage ? example What percent of the offspring are homozygous dwarf plants?

2007-03-15 20:58:25 · 3 answers · asked by maxmac97 1

three of the terms are related. one term does not belong. determine the characteristic common to three of the terms and then identify the term that does not belong.

1. inversion, translocation, duplication, nondisjunction
2. operator, promoter, repressor, gene cluster
3. dominance, codominance, incomplete dominance, polygenic inheritance
4. gene mutation, point mutation, frameshift mutation, chromosomal mutation.

2007-03-15 20:54:07 · 4 answers · asked by 009 i 1

2007-03-15 20:10:51 · 4 answers · asked by tim 3

2007-03-15 20:03:19 · 4 answers · asked by Anonymous

Which kingdom posesses unicellular animal like members as well as unicellular plant like members and multicellular members.

Kingdom Fungi
Kingdom Animalia
Kingdom Protista
Kingdom Plantae

2007-03-15 19:41:12 · 3 answers · asked by Tony 1

Please look at this problem: http://science.nhmccd.edu/biol/hwe/hwefrm3.html

I understand everything except how the first answer was obtained in the solution ( (f)A ). How does that work? Thank you!

2007-03-15 19:24:51 · 2 answers · asked by Anonymous

2007-03-15 18:53:17 · 1 answers · asked by teck kim 2

lets say you have a Bb on top and bb on the side. when you are writing the letters in the box how do you determine which letter goes first Bb or bB

2007-03-15 18:51:35 · 7 answers · asked by maxmac97 1

2007-03-15 18:31:06 · 1 answers · asked by teck kim 2

From what I have learned in psychology, the closer people are to each other in their daily lives, the more attracted they are to each other. What is the biological or psychological reason that siblings are not attracted to each other? There are obvious reasons why it would be a bad thing, of course.

2007-03-15 17:59:44 · 8 answers · asked by presidentrichardnixon 3

is it salivary gland?

2007-03-15 17:55:49 · 10 answers · asked by Anonymous

Can someone answer this question?

Trace the circulatory flow from a drop of a blood to the heart.

2007-03-15 17:30:26 · 5 answers · asked by ibid 3

2007-03-15 17:29:54 · 3 answers · asked by Anonymous

2007-03-15 17:21:21 · 2 answers · asked by Anonymous

That is, a woman's ovam splits and two or more separate sperm fertalize the idetical ova ....

2007-03-15 17:04:37 · 1 answers · asked by Lightbringer 6

DNA polymerase III could add bases in the 3'-5' direction in E. coli there would be no need for what?


Okazaki fragments, DNA ligase, gyrase aka topoisomerase, or Klenow fragments

2007-03-15 17:01:47 · 3 answers · asked by Anonymous

What is the major event in anaphase and why is it so critical to mitosis?

Do Allium cells remain permanently in interphase? Why or why not?
Thanks!

2007-03-15 17:00:50 · 4 answers · asked by Anonymous

What do you think are the various biological, social, and ethical implications of thinking that a gene directly affects a trait (such as a type of behavior)? To what extent to you think genes control our behavior?

2007-03-15 16:53:13 · 3 answers · asked by Anonymous

Huntington’s disease is degenerative disease of the nervous system caused by a lethal dominant allele that has no obvious phenotypic effect until the individual is about 35 to 45 years old. (

Sally’s father and sister both have Huntington’s disease. Sally also has a brother that was tested negative for Huntington’s disease. It is unknown whether Sally’s mother had Huntington’s disease.


a)What is the genotype for Sally’s father? Explain your answer.


b)What are the chances that Sally’s mother was homozygous dominant for Huntington’s disease? Explain your answer.


c) What are the chances that Sally will have Huntington’s disease? Explain your answer.

2007-03-15 16:42:06 · 3 answers · asked by Anonymous

2007-03-15 16:30:41 · 8 answers · asked by countrygrl278 6

2007-03-15 16:29:45 · 25 answers · asked by Anonymous

can someone explain how they relate?? and the theory of mitochondrial eve.. and how would it affect our world?

2007-03-15 16:15:16 · 6 answers · asked by fayewred 2

Two P1 generation corn are crossed and the following phenotypic characters are recorded:
Corn kernel color

Corn kernel shape




Color and kernel shape alleles:

P=purple, p=white

R=round, r=wrinkled




We cross a homozygous purple, heterozygous round parent with a heterozygous purple, wrinkled parent. Assuming these alleles obey the law of segregation and independent assortment,

a) What will be the offspring (F1) genotype ratio?

b) What will be the offspring (F1) phenotype ratio?

c) What fraction of offspring (F1) will be homozygous for both characteristics?

d) What fraction of offspring (F1) will be heterozygous for both characteristics?

2007-03-15 16:11:13 · 2 answers · asked by Anonymous

In humans, the ABO blood type is determined by multiple alleles of a single gene. The 4 blood groups (A, B, AB, or O) are a result of various combinations for the enzyme (I) that attaches the A or B carbohydrate to red blood cells.

Consider a marriage in which a man with type O blood marries a woman with type AB blood.

a) What are the chances that this couple will produce a child with type B blood?

b) What are the chances that this couple will produce a child with type AB blood?
c) What are the chances that this couple will produce a child with type O blood?

d) If this couple were to produce 2 children, what are the chances that both children have type A blood?

2007-03-15 16:10:14 · 2 answers · asked by Anonymous

Who first described the process of mitosis, when did he announce his discovery and why did he choose the word "mitosis" for the process?

2007-03-15 16:04:20 · 1 answers · asked by lvlambs 2

What physical features can you see in plant cells undergoing cytokinesis and what differences would you expect to see if you observed animal cells instead?

2007-03-15 16:02:38 · 1 answers · asked by lvlambs 2

2007-03-15 15:29:21 · 1 answers · asked by Anonymous

we learn about PTC, and I hav to do a survey on people if they can taste PTC or not. I want to know hoe can you tell if a person can taste PTC or not, how many ways are there? i need a simple and easy one. please help!

2007-03-15 15:28:32 · 1 answers · asked by JackaLxM 2

"The guard cells of non-desert plants often close during the daytime and open at night to conserve water"

or

'The guard cells of desert plants often close during the daytime and open at night to conserve water.'

Which one is false and please explain why. thanks!

2007-03-15 15:27:01 · 4 answers · asked by suju 2

wat do you think about abortion....
is it right or wrong and are you for it or not....
and tell me when do you really think when life actually started....
for example: did it start when a sperm and egg unite or when a baby body and brains and heart and blood starts

2007-03-15 15:18:05 · 3 answers · asked by just curious 2