Biology B1 Flashcards

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How many chromosones do humans have?
23 pairs, 46 total.
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Name some structural proteins.
Skin, hair, blood and cytoplasm in our cells.
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What's the genotype?
The actual gene (e.g. Aa).
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What's the phenotype?
The characteristic the gene creates (e.g. blue eyes).
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Why do children not look like their parents?
Because they will have a combination of both their parents genes and therefore a combination of their characteristics.
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What are alleles?
Different versions of the same gene (e.g. A or a).
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What are the male sex chromosomes?
XY
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What are the female sex chromosomes?
XX
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What are homozygous alleles?
Two alleles which are the same (e.g. AA).
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What are heterozegous alleles?
Two alleles which are different (e.g. Aa).
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Which characteristic will be shown if there are one or two dominant alleles?
Dominant allele's characteristic.
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Which characteristic will be shown if there are two recessive alleles?
Recessive allele's characteristic.
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How many chromosomes do sex cells contain?
23 single chromosones, one from each human pair.
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What is a false positive?
When something is negative/false but thought to be positive/true.
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What is a false negative?
When something is positive/true but thought to be negative/false.
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What is asexual repdoduction?
Non-sexual reproduction.
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What does reproducing asexually create?
Clones
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How does bacteria reproduce asexually?
It divides into two parts.
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Name a plant that can asexually reproduce.
A strawberry plant.
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Out of Huntington's disease and Cystic Fibrosis, which one is caused by a recessive allele?
Cystic Fibrosis.
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What are the symptoms of Cystic Fibrosis?
Thick sticky mucus in air passages, gut and pancreas. Breathing difficulty, chest infections and difficulty digesting food.
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What are the symptoms of Huntington's disease?
Memory loss, clumsiness, mood swings and lack of concentration.
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Other cards in this set

Card 2

Front

Name some structural proteins.

Back

Skin, hair, blood and cytoplasm in our cells.

Card 3

Front

What's the genotype?

Back

Preview of the front of card 3

Card 4

Front

What's the phenotype?

Back

Preview of the front of card 4

Card 5

Front

Why do children not look like their parents?

Back

Preview of the front of card 5
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