Genetics Part 2 Review

Multiple Choice

This term refers to half the normal chromosome number

• haploid

• 2N

• diploid

• 3N

Multiple Choice

This term refers to the production of gametes by organisms that reproduce sexually

• mitosis

• binary fission

• meiosis

• cloning

Multiple Choice

The exchange of genetic information that insures that every gamete is unique is referred to as

• mitosis

• meiosis

• reduction division

• crossing over

Multiple Choice

All sperm and egg cells are genetically identical.

• TRUE

• FALSE

Multiple Choice

The term that refers to a cell that has its full or complete number of chromosomes is

• diploid

• N

• gamete

• haplpoid

Multiple Choice

Crossing over happens when part of the genetic information of one chromosome switches places with the genetic information from another chromosome. Another term for this process is

• genetic recombination

• genetic reduction

• a mutation

• nondisjunction

Multiple Choice

Which of these is heterozygous? 

• AA
• aa
• Aa

Multiple Choice

Which of these is homozygous dominant? 

• AA
• aa
• AB

Multiple Choice

Which of these is homozygous recessive? 

• AA
• aa
• AB

Multiple Choice

What are small stretches of DNA that code for traits

• Nucleus
• Chromosomes
• Gene
• Centromeres

Multiple Choice

Where is all the genetic information in a cell?

• Nucleus
• Nucleotides
• Chromosomes
• Cytoplasm

Multiple Choice

What phenotype would result from crossing a homozygous dominant purple-flowered pea plant with a homozygous recessive white-flowered pea plant?

• Pp
• Purple
• White
• PP and pp

Multiple Choice

T - tall and t = short

In the punnett square below, what belongs in the missing square

• tt

• Tt

• Bb

• TT

Multiple Choice

What are the phenotype percentages of the offspring?

(A-Brown fur color; a-white fur color)

• 50 % Brown fur and 50% White fur

• 25 % Brown fur and 75% White fur

• 75 % Brown fur and 25% White fur

• 0% Brown fur and 100% White fur

Multiple Choice

In humans, having freckles (F) is dominant to not having freckles (f). What is the percent chance that a married couple with no freckles will give birth to a child who has freckles?

• 0%

• 25%

• 50%

• 75%

• 100%

Match

Match the following

• BB

• Bb

• bb

Homozygous Dominant

Heterozygous

Homozygous Recessive

• Homozygous Dominant

• Heterozygous

• Homozygous Recessive

Multiple Select

Which of the following is related to GENOTYPE? Choose ALL that apply

• Physical Traits

• Bb

• Homozygous

• Blue Eyes

• What alleles the person has

Multiple Select

Which of the following is related to PHENOTYPE? Choose ALL that apply

• Physical Traits

• Bb

• Homozygous

• Blue Eyes

• What alleles the person has

Match

Match the following

• Section of DNA that codes for a trait

• A version of a gene

• What alleles a person has

• What physical trait a person has

Gene

Allele

Genotype

Phenotype

• Gene

• Allele

• Genotype

• Phenotype

Hotspot

Identify all the DOMINANT alleles

Hotspot

Which of the following are associated with the DOMINANT trait?

Explanation Slide...

Alleles are found on chromosomes, and you have 23 pairs of chromosomes. Of each pair of chromosomes you got one from your mom and one from your dad. So you get one allele for a trait from your mom and one allele for a trait from your dad.

Multiple Choice

Why do genotypes always have two letters?

• Because you get one allele from each parent, meaning two in total

• Because both a dominant and a recessive allele are needed for a trait

• Because it is easier to see what type of trait it is using two letters

• Because you get two alleles from each parent for each trait

Multiple Choice

Pea plant height is determined by two alleles, T for Tall and t for short. A homozygous tall plant is cross with a short plant.

What is the probability of having an offspring that has the genotype TT?

• 0%

• 25%

• 50%

• 100%