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There are two cell divisions in meiosis and only one during mitosis. The main function of the second division in meiosis is to:

Please convert the following into scientific notation:    0.0097

F. Los tiempos perfectos: Lo que María ya ha estudiado y su plan de estudio. El periódico local quiere escribir un artículo sobre María, un estudiante sobresaliente. Lee cada oración y edita la historia de María. Elige la respuesta correcta de los verbos en los tiempos perfectos según el contexto de la oración. (1 pto. cada respuesta correcta; 8 ptos. en total)   MODELO:  Espero que los estudiantes [han ido / hayan ido / habían ido / habrían ido] al TLC para repasar para el examen el otro día.   1. Me encanta que la universidad [1] un nuevo curso de biología el semestre pasado. 2. En mi opinión, mis compañeros y yo[2] mucho en poco tiempo. 3. Para el año 2022, mis compañeras de cuarto y yo [3] los estudios universitarios. 4. De tarea el profesor nos [4] unos proyectos finales muy importantes. 5. Todos dudábamos que Sarah [5] bien su parte del proyecto. Pero al final, lo hizo fantástico. 6. Al principio del año yo pensaba que nosotros [6] sobre la comida de Chile antes de terminar la clase. En vez, aprendimos sobre la comida de Uruguay.  7. Antes de terminar mis estudios, [7] a España en un estudio al extranjero. Te lo juro. 8. Al empezar mis estudios en la universidad, yo ya [8] qué estudiar.

A son can inherit X-linked (sex-linked) genes:

Two chromosomes that are the same but not genetically identical are referred to as _______________.

A recessive allele on the X chromosome is responsible for red-green color blindness in humans.  A woman with normal vision whose father is color-blind marries a color-blind man.  What is the probability that this couple’s son will be color-blind?  (I.e., if this couple had 2 sons, what is the probability that one of them would be color blind?)

If the alleles for a particular gene interact in the heterozygous condition to give an intermediate phenotype, this would be an example of:

Pick ONE of the problems below and complete it.   Question #1. Blood types in humans are caused by a combination of two of three possible alleles – IA, IB, and i. The i allele is recessive and individuals homozygous for this allele have blood types O. Blood type A may be due to either homozygous condition or the IA i genotype.  Blood type AB is caused by having a copy of both the IA and IB alleles.  Rh factor is another “marker” on human red blood cells and is either positive (dominant—R) or negative (recessive—r). A man with blood type B-negative, whose father was A-positive and whose mother was AB-positive, married a woman that was B-positive. The woman’s mother was AB-negative and her father was AB-positive.  Give the genotypes and phenotypes of the possible offspring from this marriage.   Question #2. Normal vision (XA) in humans is dominant to color blindness (Xa) and is X-linked. The determiner for brown eyes (B) is dominant to blue eyes (b) and is not X-linked. A colorblind man with brown eyes, whose mother was blue-eyed, marries a brown-eyed woman having normal vision, whose father was colorblind with blue eyes.  What is the expected phenotypic ratio of their male and female children involving eye color and color blindness.

CHD 210 in an on-line course which means that all assignments, discussions, and quizzes must be submitted through the use of Canvas.

DNA polymerase synthesizes on the 5’ –> 3’ direction.  What is located at the 3’ end of a DNA strand?