ZOO 2 - L4 Non Mendelian

What is the central concept of Non-Mendelian Inheritance?

Genetic patterns deviate from Mendel’s laws.

In which type of inheritance is the heterozygous phenotype a mixture of the two homozygous phenotypes?

Incomplete Dominance.

Which of these is NOT an example of incomplete dominance in humans?

ABO blood type.

What happens when neither allele is fully dominant in incomplete dominance?

An intermediate phenotype is produced.

What distinguishes codominance from incomplete dominance?

In codominance, both alleles are fully and separately expressed.

Which human blood type demonstrates codominance?

Type AB.

What is the function of an antigen in the ABO blood group system?

To trigger an immune response.

What genetic condition is associated with partial codominance and resistance to malaria?

Sickle cell trait.

What is the defining feature of 'multiple alleles'?

More than two allele choices for a gene in a population.

Which of the following traits is NOT listed as an example of multiple alleles in humans?

Height.

The type of inheritance where heterozygous individuals exhibit a phenotype that is intermediate between the two homozygous phenotypes is called __________.

Incomplete Dominance.

The type of inheritance where both alleles are equally and distinctly expressed in the heterozygous condition is called __________.

Codominance.

The genetic scenario where a gene has more than two possible alleles within a population is known as __________.

Multiple Alleles.

A substance that, when introduced into the body, triggers an immune response is called __________.

Antigen.

The ABO blood group system is determined by __________ , with alleles Iᴬ, Iᴮ, and i.

Multiple Alleles.

The phenotype resulting from straight and curly hair parents that is wavy is an example of __________ .

Incomplete Dominance.

In sickle cell trait, the presence of both normal and sickle-shaped red blood cells demonstrates __________ .

Codominance.

Type O blood is referred to as the universal __________ in blood transfusions.

Donor.

Inheritance patterns that do not follow Mendel's laws of dominance and recessiveness are described as __________.

Non-Mendelian.

In incomplete dominance, the heterozygous phenotype is a __________ of the two homozygous phenotypes.

Blend.

___________ occurs when both alleles are fully expressed in a heterozygote, showing both phenotypes distinctly.

Codominance.

A gene is said to have ___________ __________ when there are more than two possible alleles in a population.

Multiple Alleles.

The ‘I’ in Iᴬ and Iᴮ alleles refers to ___________, which are found on red blood cells.

Isoagglutinogens.

Type AB blood exhibits ___________ because both A and B antigens are expressed equally.

Codominance.

Individuals with sickle cell _________ (HᴬHˢ) are typically resistant to malaria.

Trait.

Type _________ blood is known as the universal recipient because it lacks antibodies against A and B antigens.

AB.

Which statements are TRUE about Codominance?

I. Both alleles are fully expressed in heterozygotes and III. ABO blood type is an example.

Which statements are TRUE regarding Multiple Alleles?

II. A population can have more than two alleles for a gene and III. Eye color inheritance involves multiple alleles.

Which of the following are examples of Non-Mendelian Inheritance discussed in the text?

I. Incomplete Dominance, III. Codominance, and IV. Multiple Alleles.

Which of the following human traits exhibit Incomplete Dominance, as per the text?

Hair texture, Lip shape, and Skin color.

Which of the following are examples of human traits involving Multiple Alleles?

Hair color, Eye color, and ABO blood group system.

Which of the following blood types can be produced if a Type A (Iᴬi) and Type B (Iᴮi) individual have children?

Type A, Type B, Type AB, and Type O.

True or False: Non-Mendelian inheritance patterns always result in recessive phenotypes.

False.

True or False: In incomplete dominance, the dominant allele completely masks the recessive allele.

False.

True or False: Codominance leads to a blending of the two homozygous phenotypes in heterozygotes.

False.

True or False: An individual can have three alleles for the ABO blood group gene.

False.

True or False: Type O blood is the universal recipient for blood transfusions.

False.

True or False: Sickle cell trait (HᴬHˢ) provides some protection against malaria.

True.

Which of the following best describes the relationship between incomplete dominance and codominance?

They are both types of Non-Mendelian inheritance, but differ in heterozygous phenotype expression.

If hair color is determined by multiple alleles with incomplete dominance, and skin color is determined by multiple alleles with polygenic inheritance, what is the key difference in their inheritance patterns based on the text?

Skin color inheritance is more complex and influenced by environmental factors, while hair color is primarily genetic.

A woman with wavy hair (SC genotype for hair texture, incomplete dominance) and a man with curly hair (CC) are planning to have children. What is the probability that their child will have curly hair?

50%.

If a pink snapdragon is crossed with a white snapdragon, what percentage of offspring is expected to be pink?

50%.

A hospital needs to perform an urgent blood transfusion for a patient with Type B blood. Which blood type would be the SAFEST option if Type B blood is temporarily unavailable, but Type O blood is in stock?

Type O.

A couple, both with sickle cell trait (HᴬHˢ), are concerned about their children inheriting sickle cell anemia (HˢHˢ). What is the chance that their child will inherit sickle cell anemia?

25%.

A child has Type O blood, and the mother is Type A (genotype Iᴬi). What are the possible blood types of the biological father?

Type A or Type O.

A brown-eyed man (Bb genotype) and a green-eyed woman (BG genotype) have a child. What is the probability their child will have blue eyes (bb genotype)?

0%.

If a farmer wants to breed chickens that are ONLY speckled, which of the following crosses would be MOST effective over multiple generations?

Speckled chicken (BW) x Speckled chicken (BW).

Understanding Non-Mendelian inheritance is particularly crucial in which field to ensure compatibility and prevent adverse reactions?

Blood Transfusion Medicine.

A student believes that if a trait is not Mendelian, it means only environmental factors affect it. Is this belief correct or incorrect?

Incorrect, Non-Mendelian inheritance is still genetic but doesn't follow simple dominant/recessive patterns.

Cross a red snapdragon (RR) with a white snapdragon (WW). What are the phenotypic ratios of the offspring?

100% Pink.