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Biology > B13-reporduction > Flashcards

B13-reporduction Flashcards

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1
Q

what process of division is involved in asexual reproduction

A

mitosis

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2
Q

what is a cells with 23 chromosomes called

A

haploid

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3
Q

what is a cell with 46 chromosomes called

A

diploid

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4
Q

difference between mitosis and meiosis when the cell divides

A

2 diploid cells- mitosis(identical daughter cells)
4 haploid cells-meiosis

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5
Q

what is the genome

A

the entire genetic material of an organism

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6
Q

role of gene

A

small section of DNA on a chromosome. each gene codes for a particular sequence of amino acids to make a specific protein

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7
Q

homozygote

A

2 identical alleles

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8
Q

hetrozygote

A

diffrent alleles for a characteristic

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9
Q

genotype

A

alleles present or genetic makeup of an individual

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10
Q

phenotype

A

physical appearance of an individual regarding a particular characteristic

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11
Q

what are alleles

A

alternative forms of a gene

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12
Q

female sex chromosomes

A

XX

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13
Q

Male sex chromosomes

A

XY

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14
Q

what is polydactil caused by

A

a dominant phenotype caused by a dominant allele which can be inherited from one or both parents

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15
Q

what is cystic fibrosis caused by

A

a recessive phenotype that is caused by recessive alleles which must be inherited by BOTH parents

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16
Q

Name 2 types of screening for genetic disorders by screening embryos

A

Chronic villas sampling transcervical method
Chronic villas sampling transabdominal method
Amniocentesis

17
Q

What period of the pregnancy is amniocentes carried at

A

15-16 weeks

18
Q

What is amniocentes

A

Taking fluid from around the developing fetus which contains fetal cells to be screened

19
Q

What period of the pregnancy does chronic villus sampling take place

A

10 12 weeks

20
Q

How does chronic villas sampling work

A

Small sample of tissue from the developing placenta provides fetal cells to screen

21
Q

How is screening carried out

A

Cells collected
Dna isolated from embryo and tested fro diffrent genetic disorders.

Biology (10 decks)

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