41 Questions
What is the defining characteristic of co-dominance?
Both alleles in the pair are fully expressed
Which blood type demonstrates co-dominance in humans?
AB
What is the typical format for representing a genetics cross?
Using letters to denote alleles
In which type of cross does the focus lie on a single trait?
Monohybrid cross
Why is it important to understand genetic principles like co-dominance?
To predict the likelihood of different traits appearing in offspring
Which principle states that an organism possesses two alleles for any particular trait and these alleles segregate during gamete formation?
Principle of Segregation
In a monohybrid cross, how many alleles does an organism inherit for a single trait?
Two
Which type of dominance occurs when neither allele completely masks the other, resulting in an intermediate phenotype in heterozygous individuals?
Incomplete Dominance
If a pea plant has the genotype Tt for stem height, what height will it exhibit according to Mendel's principles?
Tall
How is the phenotype of plants with genotypes RR and rr different from plants with genotype Rr in incomplete dominance?
RR and rr plants show a blend of colors, while Rr shows a solid color.
What is the principle that states an organism has two alleles for a particular trait, and these alleles segregate during gamete formation?
Mendel's Principle of Segregation
In monohybrid crosses, heterozygous individuals exhibit only the dominant trait in which type of dominance?
Complete Dominance
Which type of dominance results in a blend or intermediate phenotype in heterozygous individuals?
Incomplete Dominance
What is the term for the observable characteristics resulting from alleles affecting a specific trait?
Phenotype
Which principle explains how traits are passed from parents to offspring and ensures genetic diversity?
Principle of Segregation
If a plant with genotype TT is crossed with a plant with genotype tt, what will be the phenotype of the offspring?
Tall stems only
What happens to alleles during gamete formation according to Mendel's Principle of Segregation?
They segregate and travel independently in gametes
During a monohybrid cross, if both parents are heterozygous (Aa), what is the chance their offspring will be homozygous dominant (AA)?
~25%
What is the defining feature of co-dominance?
Both alleles are fully expressed without blending
How are alleles denoted in genetics crosses?
Uppercase for recessive and lowercase for dominant
In a co-dominant scenario, if a parent has AB blood type, what are the possible alleles they possess?
IA and IB
What is the focus of monohybrid crosses?
Single trait
What types of traits exhibit predictable patterns like the classic 3:1 ratio observed by Mendel in pea plants?
Complete dominance traits
What is the primary reason for setting up Punnett squares in genetics problems?
To map out potential offspring genotypes
In genetics, what is the term for the physical expression of a genetic trait?
Phenotype
Complete dominance results in which type of phenotypic ratio in offspring?
3:1
What is the phenotypic ratio in offspring resulting from incomplete dominance?
1:2:1
In complete dominance, what is the phenotype of plants with genotype Tt?
Tall stems
What term is used to describe the event where alleles separate during gamete formation?
Segregation
Which type of dominance occurs when neither allele completely masks the other?
Incomplete dominance
When does the segregation of alleles occur according to Mendel's Principle of Segregation?
During meiosis
What is the ratio of alleles inherited for a single trait by an organism according to Mendel's principles?
3:1
Which type of cross focuses on tracking the inheritance of different versions of one gene from parents to offspring?
Monohybrid cross
What is the key difference between co-dominance and incomplete dominance?
In co-dominance, both alleles are fully expressed simultaneously, while in incomplete dominance, neither allele completely masks the other.
Which genetic concept plays a significant role in predicting the likelihood of different traits appearing in offspring?
Allelic expression
What type of ratio is commonly observed in monohybrid crosses involving traits with complete dominance?
3:1
What is the significance of setting up Punnett squares in genetics problems?
To predict the exact phenotypic ratios of potential offspring
In a co-dominant scenario with a parent having AB blood type, which statement accurately describes the possible alleles they possess?
Both A and B alleles
What principle ensures genetic diversity by stating that an organism has two alleles for a particular trait?
Law of Segregation
In incomplete dominance, what would be the phenotype of offspring resulting from crossing a red-flowered plant (RR) with a white-flowered plant (WW)?
Pink flowers
What is the main difference between monohybrid and dihybrid crosses?
Monohybrid crosses study the inheritance of one trait only, while dihybrid crosses study the inheritance of two different traits.
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