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Bio, Ch 5 Study Module
Terms in this set (25)
If a cell has 30 chromosomes before, mitosis, how many does each daughter cell have afterward?
What is the difference between stem cells and other body cells?
Stem cells are adaptable and can give rise to other types.
Which of the following refers to the inheritance of traits that are controlled by two or more genes?
is a picture of chromosomes arranged in pairs
What is the phenotypic ratio for the offspring of a cross between a homozygous dominant (ZZ) and a homozygous recessive (zz)?
According to the principle of segregation, the gametes of a heterozygous individual will be______.
50% dominant and 50% recessive
No two gametes are exactly alike genetically because_____.
each gamete has a different combination of parental chromosomes and is the result of crossing over.
Diploid cells become haploid during_____.
carry the same genes
A human somatic (body) cell has_____chromosomes.
What do the terms gene and allele have in common?
Both could refer to the same DNA sequence
Which of the following terms describes a failure of chromosomes to sort properly during meiosis?
In meiosis II, _____.
sister are separated into different daughter cells
Which of the following allows sexual reproduction to occur generation after generation?
occurs when alleles for the same trait separate during gamete formation
Recessive X-linked disorders_____.
are more common in males than females
In a Punnette square, what do the letters outside the little boxes represent?
Which of the following describes the ability of a single gene to cause multiple effects on an individual's phenotype?
What is the major difference between dominant and recessive alleles of the same trait?
When both are present in heterozygote, only the dominant allele is expressed.
The sex of a human fetus is determined by the_____.
sex chromosome found in the sperm
A carrier of a human genetic disorder is_____.
heterozygous for a recessive disorder-causing allele
How does meiosis generate genetic diversity?
Homologous chromosomes cross over during prophase I; and during metaphase I, chromosomes align randomly.
In humans, meiosis produces cells that are_____.
haplois, called gametes
A gene is_____.
the unit of inheritance that codes for proteins
The members of a homologous pair of chromosomes_____.
have the same genes but unique sets of alleles
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