What type of gametes will form by genotype RrYy?
RrYy is a dihybrid, so four type of gametes are formed as RY, Ry, rY, ry.
A dihybrid condition is
Dihybrid condition involves simultaneous inheritance of two pairs of mendelian factors or genes.
Which one of the following traits of garden pea studied by Mendel was a recessive feature?
Yellow seed colour is dominant over green seed colour.
45+X embryos are born with ____.
45 +X, embryos are born with Turner’s syndrome. It affects development in females due to missing X chromosome.
An organism with two identical alleles is
Homozygous individuals have identical mendelian factors or genes for a character (TT or tt). They are always pure for a particular trait (character).
One of the contrasting forms of character is said to be a/an ____.
One of the contrasting forms of character is said to be an allele.
The number of autosomes in human female ovum is
In human female ovum, number of autosome are 22 pairs.
Haemophilia is an example of ____ disease.
Haemophilia is an example of a sex-linked recessive disease. It is associated with the X chromosome.
Mutation caused by a mutagen is
Mutation induced by a mutagen are called as induced mutation.
Genes located on Y-chromosome are
Holandric genes are present on the differential region of the Y-chromosome. The differential regions carry completely sex linked genes and they do not undergo crossing over.
Linkage map construction is based on ____.
Linkage map construction is based on crossing over frequency.
Mendel proposed which of following term for hereditary units?
Mendel factor now known as gene (Johannsen, 1905) is a unit of inheritance.
Identify the wrong statement
In domesticated fowls the sex is determined by the ovum.
In pea plants, size of starch grains and seed shape is controlled by ____.
In pea plants, size of starch grains and seed shape is controlled by the same gene with two alleles.
The resemblance of individuals to their progenitors is called
Heredity is the transmission of genetic characters from parents to the offspring.
Experimental proof for the chromosome theory of inheritance was provided by ____.
Experimental proof for the chromosome theory of inheritance was provided by Morgan.
Haemophilia is
Haemophilia is a X-linked disease. It is also known as Royal's disease. Haemophilia is due to mutation in factor VIII of blood clotting Anti -Haemophilic Globin factor(AHG) which is also known as AHF (Anti Haemophilic Factor).
A gene is said to be dominant if
A dominant gene would lead to the expression of its phenotype irrespective of the fact whether its allelic gene is dominant or recessive.
The branch of botany dealing with heredity and variation is called
Genetics is the study of principles and mechanism of heredity and variations.
Alleles are form of
Allele is an alternative form of a gene for example, T and t alleles represent tall and short stem height of pea plant.
Frameshift mutations are caused by ____.
Frameshift mutations are caused by deletion or insertion of a nucleotide. As a result of deletion or insertion of nucleotides the entire sequence of triplet codons involved in protein synthesis changes.
ZW method of sex determination is seen in ____.
ZW method of sex determination is seen in birds.
Mutation is
Mutation is generally recessive. Mutation is a process which produces a heritable alteration in the genotype. Mutations are classified into two main types: (a) Chromosomal mutation; (b) Point mutation.
On inbreeding, the homozygous parents plants will produce ____.
On inbreeding, the homozygous parent plants will produce all similar offspring. Homozygous plants have both the alleles of the same type and hence the offspring produced will of the same type.
In co-dominance, F1 hybrids show ____.
In co dominance, F1 hybrids show both dominant and recessive characters side by side.
Down’s syndrome is a genetic disorder characterized by ____.
Down’s syndrome is a genetic disorder characterized by all body cells having an extra chromosome.
In man, which of the following genotypes and phenotypes may be the correct result of aneuploidy in sex chromosomes
An addition or loss of chromosomes is more or less than an entire set of chromosomes, is known as aneploidy.
Which pair is chromosomal aberration?
Duplication & Translocation is chromosomal abberrations. Duplication & translocation both are mutation.
Mendel’s factors are now known as ____.
Mendel’s factors are now known as genes.
Haemophilia is more common in males because it is a
Haemophilia is a sex linked recessive trait carried by X chromosome (also known as bleeder's disease).
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