Question

What term is used to express the idea that several genes exert influence over the same characteristic?

Select one:

a. terminal interaction

b. transformation

c. co-adhesion

d. coextension

e. gene interaction

A condition in which one gene pair masks the expression of a nonallelic gene pair is called ________.

Select one:

a. recessiveness

b. dominance

c. codominance

d. epistasis

e. additive alleles

One result of X-linkage is a crisscross pattern of inheritance in which sons express recessive genes of their fathers and daughters express recessive genes of their mothers.

Select one:

True

False

Sex-limited inheritance is the same as sex-linked inheritance.

Select one:

True

False

Sex-limited inheritance is the same as sex-linked inheritance.

Select one:

True

False

Because of the mechanism of sex determination, males of many species can be neither homozygous nor heterozygous. Such males are said to be ________.

Select one:

a. hemizygous

b. dominant

c. None of the answers listed are correct.

d. complementary

e. recessive

To which of the following does the term heteroplasmy refer?

Select one:

a. a circumstance that is homologous to incomplete dominance

b. conditions in which the germ plasm is a mixture of dominant and recessive genes

c. various stages of development of mitochondria and chloroplasts

d. cells with a variable mixture of normal and abnormal organelles

e. heterozygous individuals with more than one gene pair involved

Which of the following organelles are involved in the general category of organelle heredity?

Select one:

a. golgi and nuclei

b. mitochondria and chloroplasts

c. golgi and rough endoplasmic reticulum

d. lysosomes and peroxisomes

e. factors and episomes

With incomplete dominance, a likely ratio resulting from a monohybrid cross would
be ________.

Select one:

a. 1:2:1

b. 9:3:3:1

c. 1:2:2:4

d. 3:1

e. 3:3

What would be a typical phenotypic monohybrid ratio in which a lethal allele is involved?

Select one:

a. 6:2:3:1

b. 3:1

c. 9:3:3:1

d. 13:5

e. 2:1

A situation in which there are more than two alternative forms of a given gene would be called ________.

Select one:

a. multiple alleles

b. alternation of generations

c. incomplete dominance

d. codominance

e. hemizygosity

Answer 1

• Answer in 1. Answer is Giene interaction i.e see Explanation - Gene interactions occur when two or more allelic or non allelic genes of same genotype influence the outcome of particular Phenotypic Characters. 2. Answer is epistasis ie de Explanation: - The masking of the phenotypic effect of alleles at one gene by alleles of another - gene is called epistasis and the gene is called epistatic gene. When its present it suppress the effect of gene at another locus. 3. Answer is ofalse" Explanation - when a gene being present on the x Chromosome, but not on the r chromosome, it is called x linked. Rather Homozygous or heterozygous it is called hemizygous male.
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4. Answer is 'False' Explanation: Sex limited inheritance is autosomal inheritance. These are a genes are not found on x or Y Chromosome and found only one gender sex linked inheritance is the sex specific patterns when a gene mutation is presenton a sex chromosome rather than a non sex Chromosome. In humans it is x linked on Ylinked. I Answer is "Hemizygouse i.e. a ² Explanation: Hemizygous is a condition in which only One copy of a gene or DNA sequence is - Present in diploid cells · males are hemi7ggoy for having only one x and one y Chromosome.

Answer is ad mixture of normal i.e. cells with a variable and abnormal organelles. Explanation: Heteroplasmy is the presence of more than One type of organellar genome within a cell or individual. It refers to a cell that has a uniform Collection of mtDNA either completely mt DNA or completely mutant DNA. Answer is cb' mitochondria and Chloroplasts. Explanation in Because Organelles reside in the cytoplasm, the organele genes generally show strictly - maternal inheritance controlled by - mitochondria and chloroplast. 8. Anaswer is 'a' ie 1:2:1. Explanation: - In incomplete dominance phenotypic and genotypic ratio will Similiar ie 1:2:1 It is a phenomenon where intermediate Character is expressed i.e. crossing of red and white flower produce pink flower..

die i.e 2:1 9. Answer is Explanations a In normal case the phenotypic ratio is 3:1 but when one lethal allele present it shows 2:1 by showing its lethal affect. . Answer is GA" mu Hiple alleles. Explanation: When more than two alternative forms of a particular gene occur they are called multiple allele which present in the same locus controll same character.