2 Genetics - Match the terms with the most suitable description. (Points : 16) P

ID: 49748 • Letter: 2

Question

2 Genetics - Match the terms with the most suitable description.
(Points : 16) Potential Matches: 1 : recessive 2 : sex-linked 3 : pleiotropy 4 : carrier 5 : dominant 6 : phenotype 7 : polygenic 8 : genotype     Answer      : An allele that can be expressed by an individual that is heterozygous.      : The genetic make-up of an individual.      : The control of more than one phenotypic character by a single gene.      : The visible physical expression of an individual's genetic make-up.      : An allele that can only be expressed when an individual is homozygous.      : A trait controlled by more than just a single pair of alleles.      : A trait controlled by a gene located on either the X or Y chromosomes.      : An individual carrying only one allele of a recessively inherited disorder. 3. Evolution - Match the terms with the most suitable description.
(Points : 16) Potential Matches: 1 : hybrid sterility 2 : habitat isolation 3 : hybrid inviability 4 : geographic isolation 5 : mechanical isolation 6 : gamete mortality 7 : temporal isolation 8 : behavioral isolation     Answer      : Because of a single mutation in a developmental gene, two closely related species of wasps have a slightly different anatomy of their sex organs making interbreeding impossible.      : Two species of snakes are morphologically very similar but breed during different seasons.      : Two similar species of treehoppers live and feed on two separate species of trees.      : Males of two species of birds use different mating dances to attract their mates.      : Due to a geographic barrier, a small portion of a population remains isolated and its gene pool diverges from that of the original population.      : Sperm from a male of one species dies in the reproductive tract of the female of a different species before fertilization can occur      : Mules are a cross between a donkey and a horse; they are viable, healthy animals, but they cannot reproduce.      : A cross between two species of salamanders yields offspring, but they do not survive long enough to reproduce 2 Genetics - Match the terms with the most suitable description.
(Points : 16) Potential Matches: 1 : recessive 2 : sex-linked 3 : pleiotropy 4 : carrier 5 : dominant 6 : phenotype 7 : polygenic 8 : genotype     Answer      : An allele that can be expressed by an individual that is heterozygous.      : The genetic make-up of an individual.      : The control of more than one phenotypic character by a single gene.      : The visible physical expression of an individual's genetic make-up.      : An allele that can only be expressed when an individual is homozygous.      : A trait controlled by more than just a single pair of alleles.      : A trait controlled by a gene located on either the X or Y chromosomes.      : An individual carrying only one allele of a recessively inherited disorder.

Explanation / Answer

1 : Recessive: An allele that can only be expressed when an individual is homozygous

2: Sex-linked: A trait controlled by a gene located on either the X or Y chromosomes.

3: Pleiotropy: The control of more than one phenotypic character by a single gene.

4: Carrier: An individual carrying only one allele of a recessively inherited disorder.

5: Dominant : An allele that can be expressed by an individual that is heterozygous

6: Phenotype : The visible physical expression of an individual's genetic make-up

7: Polygenic: A trait controlled by more than just a single pair of alleles.

8: Genotype: The genetic make-up of an individual

Evolution

1: hybrid sterility : Mules are a cross between a donkey and a horse; they are viable, healthy animals, but they cannot reproduce.

2: habitat isolation : Two similar species of treehoppers live and feed on two separate species

3: hybrid inviability : A cross between two species of salamanders yields offspring, but they do not survive long enough to reproduce.

4: geographic isolation: Due to a geographic barrier, a small portion of a population remains isolated and its gene pool diverges from that of the original population

5: mechanical isolation: Because of a single mutation in a developmental gene, two closely related species of wasps have a slightly different anatomy of their sex organs making interbreeding impossible

6: gamete mortality: Sperm from a male of one species dies in the reproductive tract of the female of a different species before fertilization can occur

7: temporal isolation: Two species of snakes are morphologically very similar but breed during different seasons.