Genetics and Inheritance

What best describes a gene?

• All of the DNA in a cell

• A section of just one chromosome that codes for a trait

• A pair of chromosomes that have the same information

• A packet of DNA that is condensed inside the nucleus

What best describes a chromosome?

• All of the DNA in a cell

• A section of just one chromosome that codes for a trait

• A pair of chromosomes that have the same information

• A packet of DNA that is condensed inside the nucleus

What best describes a genome?

• All of the DNA in a cell

• A section of just one chromosome that codes for a trait

• A pair of chromosomes that have the same information

• A packet of DNA that is condensed inside the nucleus

What best describes homologous chromosomes?

• All of the DNA in a cell

• A section of just one chromosome that codes for a trait

• A pair of chromosomes that have the same information

• A packet of DNA that is condensed inside the nucleus

Which of the following are true of Meiosis? (pick all that are true!)

• There is only 1 division

• It ends with 4 cells

• The ending cells are all unique

• Homologous chromosomes line up together

What is true of MITOSIS and not MEIOSIS? (pick all that are true!)

• Crossing over happens

• There is only 1 division

• Independent assortment happens

• The result is two identical cells

How many pairs of chromosomes do we have?

• 23

• 46

• 12

• 2

What is an allele?

• Different version of a gene

• another name for homologous chromosome

• All the DNA in any organism

• One whole strand of DNA condensed in the nucleus

Why are crossing over and independent assortment important processes in evolution?

• They make sure bad genes are left behind.

• They lead to beneficial mutations

• They occur in mitosis but not in meiosis

• They create variation in the population, and variation is the key to evolution being able to happen.

Why are YOU unique? (click all that apply!)

• I have a special combination of many genes that I got from my parents

• Independent assortment allowed for many different combinations for each of my parents' gametes

• Crossing over allowed for new combination of genes

• It was totally random which two of my parents' gametes came together to form me