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Ch. 29 Heredity
Marieb - Human Anatomy & Physiology 11th Edition
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Marieb, Hoehn 11th EditionCh. 29 Heredity문제 2
29장, 문제 2

Match the following types of inheritance (key terms a–f) with
the descriptions below:

Key:
(a) dominant-recessive
(b) incomplete dominance
(c) multiple-allele
(d) polygene
(e) sex-linked
(f) extranuclear

____ (1) only sons show the trait
____ (2) homozygotes and heterozygotes have the same phenotype
____ (3) heterozygotes exhibit a phenotype intermediate between those of the homozygotes
____ (4) phenotypes of offspring may be more varied than
those of the parents
____ (5) inheritance of ABO blood types
____ (6) inheritance of stature
____ (7) reflects activity of mitochondrial DNA

검증된 단계별 안내
1
Step 1: Understand that sex-linked inheritance (e) typically affects only one sex, often males, because the gene is located on a sex chromosome (usually the X chromosome). Therefore, the description 'only sons show the trait' corresponds to (e) sex-linked.
Step 2: Recognize that in dominant-recessive inheritance (a), heterozygotes and homozygous dominants have the same phenotype because the dominant allele masks the recessive one. Thus, 'homozygotes and heterozygotes have the same phenotype' matches (a) dominant-recessive.
Step 3: In incomplete dominance (b), heterozygotes show an intermediate phenotype between the two homozygotes. So, 'heterozygotes exhibit a phenotype intermediate between those of the homozygotes' corresponds to (b) incomplete dominance.
Step 4: Multiple-allele inheritance (c) involves more than two alleles for a gene, leading to greater phenotypic variety among offspring than parents. Hence, 'phenotypes of offspring may be more varied than those of the parents' matches (c) multiple-allele.
Step 5: The inheritance of ABO blood types is a classic example of multiple alleles (A, B, and O), so 'inheritance of ABO blood types' also corresponds to (c) multiple-allele. For 'inheritance of stature,' which is influenced by many genes, this matches (d) polygene. Finally, 'reflects activity of mitochondrial DNA' refers to (f) extranuclear inheritance.

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Sex-linked Inheritance

Sex-linked inheritance refers to genes located on sex chromosomes, often the X chromosome. Traits following this pattern typically appear more frequently in males, as they have only one X chromosome, so recessive alleles are expressed. An example is hemophilia, where only sons may show the trait if inherited from carrier mothers.
추천 영상:
가이드 코스
04:17
Sex-Linked Inheritance

Incomplete Dominance

Incomplete dominance occurs when heterozygotes display a phenotype that is intermediate between the two homozygous forms. Unlike dominant-recessive inheritance, neither allele is completely dominant, resulting in blended traits, such as pink flowers from red and white parents.
추천 영상:
가이드 코스
03:09
Incomplete Dominance

Multiple-Allele Inheritance

Multiple-allele inheritance involves more than two allele forms for a single gene within a population. This increases phenotypic variety, as seen in the ABO blood group system, where three alleles (A, B, O) combine to produce different blood types.
추천 영상:
가이드 코스
07:23
X-Linked Inheritance
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