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Compare and contrast the natural formation of identical twins to the artificial embryo twinning process.  Explain how the formation of identical twins or the process of artificial embryo twinning differs from the formation of fraternal twins. 

Posted 5 years ago by miyaomar in Biology 30 | 0 answers
#twins #formation #artifical 

1A(g)+3B(g)<->2C(g)

2.00 mil of A and B are placed in a 500ml container at equilibrium C was found to be 0.16mol/L has formed. Calculate the equilibrium constant for formation of C. 

Posted 5 years ago by Chemboy in Chemistry 30 | 1 answers
#redox unit 

Use of Power by Dictators

Dictators use the following four techniques to gain and maintain power:

indoctrination force and terror use of scapegoats propaganda

Create a slideshow to demonstrate how both Stalin and Hitler used these techniques.

Posted 5 years ago by Summer99 in Social Studies 30-2 | 1 answers
#hitler 

 
 
 
Melanin is a skin pigmentation that absorbs and dissipates broadband UV rays. Since UV radiation causes DNA damage, melanin pigments protect the skin and reduce the risk of cancer. When skin is exposed to sunlight, melanin production is increased, causing the skin to tan. This demonstrates that
Select one:
 the environment causes mutations that increase the chance of survival
. the environment causes mutations that have a large effect on the chance of survival
the environment causes mutations that have no effect on the chance of survival
 the expression of some genes is influenced by the environment
 
A male and female have three children, all girls. The couple is expecting their fourth child. The probability their fourth child will be female is __i__, and the probability the couple will have four female children is __ii_. The row that indicates the correct probabilities is
Select one:
a.  i ii     
b.  i ii     
c.  i ii     
d.  i ii     

Posted 5 years ago by miyaomar in Biology 30 | 0 answers
#dna #punnet #genes 

Which of the following statements correctly describes the Law of Independent Assortment?
Select one:
 Sometimes all alleles lack dominance, which leads to a blending of traits.
The dominant allele is represented with an uppercase letter and the recessive allele is represented with a lowercase letter.
 A large Punnett square can be used to predict the outcome of a parental cross involving two traits.
Non-allelic genes do not affect each other if they are located on separate chromosomes.

Posted 5 years ago by miyaomar in Biology 30 | 0 answers
#punnet #law #alleles 

In fruit flies, long wings (L) are dominant over short wings (l). LL, Ll, and ll represent
Select one:
 Three genotypes
 Three true breeding crosses
 Three dominants
 Three phenotypes

Posted 5 years ago by miyaomar in Biology 30 | 1 answers
#geno #phenotypes #dominate 

The roan coat colour in shorthorn cattle is the result of codominance of the coat colour alleles. A roan shorthorn mated with a white shorthorn. What is the probability that the offspring will be white shorthorn? AnswerRecord the answer as a value between 0 and 1, with two significant digits.

 

 

In cattle, a polled or hornless trait (P) is dominant over a horned trait(p). A polled bull mated with three different cows, and the following calves were born in the spring.  Cow Phenotype  F1 Generation Phenotype  Cow 1 - Horned  Calf 1 - Horned  Cow 2 - Polled  Calf 2 - Horned  Cow 3 - Polled  Calf 3 - Polled  Which of the following rows correctly identifies the genotypes of the cattle?
Select one:
Cow 2 - pp  Calf 1 - Pp 
Cow 1 - pp  Bull - PP 
Cow 3 - Pp  Calf 3 - pp 
Bull - Pp  Calf 2 - pp 

Posted 5 years ago by miyaomar in Biology 30 | 0 answers
#genetics #punnet #help 

Which of the following statements describes Mendel’s Law of Segregation?
Select one:
A Bb individual will produce B and b alleles, while a bb individual will only produce a b allele.
The dominant allele is represented with an uppercase letter and the recessive allele is represented with a lowercase letter.
A Punnett square can be used to predict the outcome of a parental cross.
Dominant alleles are always expressed in a homozygous or heterozygous individual.
 
In tomatoes, red fruit (R) is dominant over yellow fruit (r). Five generations of red tomato plants were crossed with yellow tomato plants without producing any yellow tomato plants. It can be hypothesized that the red tomato plant must be
Select one:
Homozygous
Dominant
Heterozygous
Recessive
 
 
 
Which of the following statements illustrates codominance?
Select one:
Grey heterozygous chickens have black and white feathers.
Individuals who are heterozygous for the sickle cell anemia allele are more resistant to malaria.
two parents with blood types A and B can have children with blood type O.
. Red flowers crossed with white flowers produce pink flowers.

Posted 5 years ago by miyaomar in Biology 30 | 0 answers
#geno #genetics #homozygous 

Describe the processes of sexual reproduction and asexual reproduction through parthenogenesis. 
There is a lack of dominance in four o’clock plant flowers. When a red flower is crossed with a white flower, a pink flower is produced. A white four o’clock flower was crossed with a pink four o’clock flower. What is the likelihood of getting red flowers from this cross?
Select one:
50%
0%
25%
 100%

Posted 5 years ago by miyaomar in Biology 30 | 0 answers
#punnet #help #sexual 

 
 
There is a lack of dominance in black and white horse coat colours. An offspring produced from a black horse and a white horse has a blue-roan coat colour. When the blue-roan coat is closely examined, both black and white hair can be found. A black horse mated with a blue roan horse. Which of the following alternatives correctly identifies the phenotypic ratio of the offspring?
Select one:
1 white : 1 black
1 WW : 1 BB
 1 BB : 1 BW
1 black : 1 blue roan
 
here is a lack of dominance in four o’clock plant flowers. When a red flower is crossed with a white flower, a pink flower is produced. A white four o’clock flower was crossed with a pink four o’clock flower. What is the likelihood of getting red flowers from this cross?
Select one:
 50%
 0%
25%
100%

Posted 5 years ago by miyaomar in Biology 30 | 0 answers
#bb #heterozygous #homozygous 

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