D3.2 HL Gene Linkage and Chi Squared

What is the term used to describe the specific location of a gene on a chromosome?

• Genome

• Chromatid

• Allele

• Locus

Which phase of meiosis is responsible for recombination through crossing over?

• Anaphase I

• Prophase I

• Metaphase II

• Telophase II

Which of the following is NOT a factor affecting the likelihood of crossing over?

• Distance between genes

• Chromosome length

• Chromosome number

• Gene expression level

How are linked genes typically represented in genetic notation?

• In brackets

• With two lines

• With a slash

• Side by side

What is the expected phenotypic ratio for a dihybrid cross involving unlinked genes?

• 1:1

• 3:1

• 2:1

• 9:3:3:1

In a genetic cross, what does a recombinant genotype indicate?

• No crossing over occurred

• Crossing over occurred

• Genes are unlinked

• Genes are on different chromosomes

What is the purpose of using a chi-squared test in genetics?

• To determine gene linkage

• To predict phenotypic ratios

• To compare observed and expected data

• To identify dominant alleles

What does the null hypothesis state in a chi-squared test?

• The expected data is incorrect

• There is no significant difference

• There is a significant difference

• The observed data is incorrect

If the calculated chi-squared value is greater than the critical value, what should be concluded?

• Data is not significant

• Accept the null hypothesis

• Reject the null hypothesis

• Data fits the expected ratio

What is the degrees of freedom in a chi-squared test with four categories?

• 2

• 5

• 3

• 4