Unit 4 : Genetics

1

The largest organelle in a cell is the ____ .

1

The first thing to divide during cell division is the which controls and directs the activities of the cell throughout life; it contains the which is passed from generation to generation during reproduction.

1

Each consists of , a huge molecule consisting of 2 strands in the form of a double helix which runs of the chromosome and is supported by .

1

A pair of genes with the same alleles are called ____ .

1

When the chromosomes have paired up closely, each pair is called a .

1

Crossing over occurs in ____ .

1

The four cells produced in meiosis differ genetically from each other because of & .

1

Mutations occurring in the body cells of multicellular organisms are called ____ mutations.

1

A mutation is a change in the or of which may result in a of an organism.

1

Non - disjunction is the term given to the ____ and go to opposite poles during the nuclear division of the nucleus.

1

People with down syndrome have an extra chromosome __ , giving them a total of 47 chromosomes.

1

In chromosome mutations there is a change in the or of . Gene mutations are changes in the of in the of a gene.

1

Sickle cell anaemia is brought about by base substitution which is an example of a gene mutation. Here is substituted with which causes the mutation.

1

Haemoglobin, the - transporting pigment of red cells, is made of 4 molecules that interlock and form a compact molecule -two of the haemoglobin molecules are known as and the other two as .

1

The gene that codes for the amino acid sequence of beta haemoglobin occurs on chromosome ____ .

1

The gene that codes for beta haemoglobin is prone to a substitution of the base to in a codon for the amino acid glutamic acid.

1

Haemophilia is a condition because the genes controlling the production of the blood proteins concerned are located on the chromosome .

1

As in mitosis, chromosomes replicate to form chromatids during interphase, however, in meiosis _ chromosomes _ and by the end of meiosis _ they have _ but the chromatids they consist of do not separate until meiosis .

1

Ways of checking for sickle cell anaemia in embryos are:

1

The effects on the properties of the haemoglobin molecule if this base substitution occurs are:

1

The inheritance of a single characteristic is known as a monohybrid cross.

1

If alleles for a gene are different, they are said to be ___.

1

The _ is the way in which the _ of an organism is expressed- including the ___ of the organism.

1

when both alleles are expressed they are known as ___.

1

A gene is a pair of alleles that both affect the phenotype of an organism when present in a heterozygote.

1

A gene is the basic unit of inheritance by which inherited characteristics are transferred from parent to offspring, consisting of a length of DNA on a chromosome.

1

Examples of recessive conditions controlled by genes on the X chromosome are :

IBD (Unit 4 : Genetics) Biology Test sobre Unit 4 : Genetics, creado por cloud.berry el 28/05/2013.

Unit 4 : Genetics

Unit 4 : Genetics

The largest organelle in a cell is the ____ .

The first thing to divide during cell division is the ____ which controls and directs the activities of the cell throughout life; it contains the ____ which is passed from generation to generation during reproduction.

Each ____ consists of ____, a huge molecule consisting of 2 ____ strands in the form of a double helix which runs ____ of the chromosome and is supported by ____ .

A pair of genes with the same alleles are called ____ .

When the ____ chromosomes have paired up closely, each pair is called a ____.

Crossing over occurs in ____ .

The four ____ cells produced in meiosis differ genetically from each other because of ____ &amp; ____ .

Mutations occurring in the body cells of multicellular organisms are called ____ mutations.

A mutation is a change in the ____ or ____ of ____ which may result in a ____ of an organism.

Non - disjunction is the term given to the ____ and go to opposite poles during the nuclear division of the nucleus.

People with down syndrome have an extra chromosome __ , giving them a total of 47 chromosomes.

In chromosome mutations there is a change in the ____ or ____ of ____ . Gene mutations are changes in the ____ of ____ in the ____ of a gene.

Sickle cell anaemia is brought about by base substitution which is an example of a gene mutation. Here ____ is substituted with ____ which causes the mutation.

Haemoglobin, the ____ - transporting pigment of red cells, is made of 4 ____ molecules that interlock and form a compact molecule -two of the haemoglobin molecules are known as ____ and the other two as ____ .

The gene that codes for the amino acid sequence of beta haemoglobin occurs on chromosome ____ .

The gene that codes for beta haemoglobin is prone to a substitution of the base ____ to ____ in a codon for the amino acid glutamic acid.

Haemophilia is a ____ condition because the genes controlling the production of the blood proteins concerned are located on the ____ chromosome .

As in mitosis, chromosomes replicate to form chromatids during interphase, however, in meiosis __ ___ chromosomes ___ and by the end of meiosis ___ they have ___ but the chromatids they consist of do not separate until meiosis __.

Ways of checking for sickle cell anaemia in embryos are:

The first thing to divide during cell division is the which controls and directs the activities of the cell throughout life; it contains the which is passed from generation to generation during reproduction.

Each consists of , a huge molecule consisting of 2 strands in the form of a double helix which runs of the chromosome and is supported by .

When the chromosomes have paired up closely, each pair is called a .

The four cells produced in meiosis differ genetically from each other because of & .

A mutation is a change in the or of which may result in a of an organism.

In chromosome mutations there is a change in the or of . Gene mutations are changes in the of in the of a gene.

Sickle cell anaemia is brought about by base substitution which is an example of a gene mutation. Here is substituted with which causes the mutation.

Haemoglobin, the - transporting pigment of red cells, is made of 4 molecules that interlock and form a compact molecule -two of the haemoglobin molecules are known as and the other two as .

The gene that codes for beta haemoglobin is prone to a substitution of the base to in a codon for the amino acid glutamic acid.

Haemophilia is a condition because the genes controlling the production of the blood proteins concerned are located on the chromosome .

As in mitosis, chromosomes replicate to form chromatids during interphase, however, in meiosis _ chromosomes _ and by the end of meiosis _ they have _ but the chromatids they consist of do not separate until meiosis .

The _ is the way in which the _ of an organism is expressed- including the ___ of the organism.