Bean burrito

"Did you know that every time you eat a bean burrito you are helping save the Earth? Go

Homework

Activity 1

Recall the text Bad luck, read this paragraph and write a conclusion including these words: controversy, scientists, environmental factors, bad luck (random mutations), cancer, probability.

El entorno condiciona la respuesta a la enfermedad más que la herencia

Hace no mucho, la ciencia parecía dar la razón a quienes creían en el destino, aunque este no estuviese escrito en las estrellas sino en el interior de nuestras células. La secuenciación de genomas completos ayudaría a predecir qué enfermedades podría padecer una persona cuando se aproximase a la vejez y qué hábitos debería evitar para sortear los riesgos escritos en sus genes.

Sin embargo, aunque la herencia tiene una influencia importante en muchas enfermedades, estudios recientes muestran que la predicción de nuestro futuro va a requerir más que leer y entender el código genético.

Recientemente, un polémico estudio publicado en la revista Science, afirmaba que la 'mala suerte' explica dos tercios de todo el riesgo de cáncer en un tejido mientras que las variables genéticas y ambientales explican otro tercio. Ahora, un trabajo publicado en Cell concluye que las variaciones en el sistema inmune, el departamento de defensa del organismo que ayuda a combatir el cáncer y el resto de enfermedades, le deben mucho más a las experiencias y al entorno en que se ha vivido que a las condiciones heredadas. Para responder con éxito ante una infección o un tumor incipiente, el mecanismo de protección del organismo debe ser flexible frente a las presiones ambientales y la experiencia vital de cada individuo lo personaliza.

If you want to read more

 

Unit 4. Genetic Science Ethics

For each of the scenarios below,  make a decision and explain your reasons. Go

Genetic problems

In cats, fluffy is dominant to silky and chubby is dominant to skinny.

1. One parent is homozygous silky and homozygous chubby. The other parent is heterozygous for all traits. What percentage of the offspring may be fluffy and thin?

2. One parent is homozygous fluffy and heterozygous chubby and the other is homozygous silky and heterozygous chubby.
   1. What percent of their offspring could be fluffy and chubby?
   2. What percent of the offspring could be homozygous for fluffiness?
   3. What percent of the offspring could be homozygous for chubbiness?
3. Both parents are heterozygous for both traits
   1. What fraction of the offspring could have the exact same genotype as the parents?
   2. What fraction of the offspring could have the same phenotype as the parents?

In eagles, bald is dominant to feathers and loner is dominant to groupie.

4. One parent is heterozygous bald and homozygous loner. The other is homozygous recessive for both traits.
   1. What percentage of the offspring may be feathered loners?
5. One parent is homozygous dominant for both traits and the other is homozygous recessive for both traits.
   1. What percentage of the offspring may be bald groupies?
   2. What percentage of the offspring may be heterozygous for both traits?
6. One parent is homozygous bald and homozygous groupie. The other is heterozygous for both traits.
   1. What percentage of the offspring may be homozygous bald and heterozygous loners?
   2. What percentage of the offspring may be feathered groupies?

An aquatic arthropod called a Cyclops has antennae that are either smooth or barbed. The allele for barbs is dominant. In the same organism, resistance to pesticides is a recessive trait.

 

7. Make a "key" to show all the possible genotypes (and phenotypes) of this organism.

Severo Ochoa

 Watch the presentation and do the activities.

  Severo Ochoa and the genetic code

Mitosis homework

Draw this diagram of mitosis in your notebook, label it and answer the questions.

Rosalind Franklin

Read these Britannica’s and The Guardian's entries and answer:

1. Who was Rosalind Franklin?
2. What are the scientific areas she worked in?
3. What did she discover related to the DNA?
4. What did she discovered related to viruses?
5. What is “photograph 51”? What is the name of the technique she used to take it?
6. Why wasn't she awarded the Nobel Prize?
7. Who were awarded this Prize?
8. Who was Maurice Wilkins?

DNA

Homework

GENETIC TRAITS?

1. Go over each of the following traits and determine if you or your relatives exhibit the phenotype. Also view the presentation that shows pictures of these traits at Human Genetic Traits

You can add more traits or diseases.

Trait Description	Yourself	Your relatives
Ear points (Darwin's Point)
Tongue rolling
Plays a sport
Attached earlobe
Plays an instrument
Hitchhiker’s Thumb
Upturned Nose
Left-Handed
Freckles
Bent little fingers
Curly hair
Short big toe
Eye Color (blue?)*
Straight Hairline (not widow's peak)
Chin dimple or cleft
Hand clasping, left over right thumb
Hair on middle joints of fingers
G.P.A. (grade point average)of 4 or above (A students= 10 students)
Ring finger longer than index finger**
Likes broccoli
Arm folding ­ fold arms across stomach, is left on top?
Popularity (how many consider themselves popular)
Nearsighted
Gap between front teeth

2. Make a pedigree of your family showing the treats you share with your relatives (you can use colors to represent each treat). (Note: circles:women).