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Simple Genetics
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Punnett squares, genetics, Mendel - Chapter 6.3-6.5 in McDougal-Littel's Biology
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
The combinations of letters or alleles (genes) for a trait are its ____________________.
phenotype
genotype
homologous chromosome
sister chromatids
2
The allele that is expressed or observed even in the heterozygous condition is ____________.
hybrid
recessive
dominant
genotype
3
The allele that can only be observed when it is homozygous (purebred) is ___________________.
recessive
heterozygous
dominant
phenotype
4
____________________are distinguishing characteristics that are inherited.
Punnett squares
Traits
Dominance
Phenotypes
5
Two alleles that are both the same for a certain trait are called __________________alleles.
homozygous
hybrid
heterozygous
homologous
6
Organisms donate ______ copy of each gene in the haploid gametes.
46
1
23
0
7
The term ______________________means “one cross” or “crossing one trait.”
dihybrid
monohybrid
homozygous
heterozygous
8
Which are dominant, purple-flowered pea plants or white-flowered pea plants?
equal dominance
purple
a blend of the two
white
9
_____ _____ are grids that are used to predict all possible genotypes resulting from a cross.
Punnett squares
Pedigrees
Karyotypes
Line graphs
10
Which of the following represents a heterozygous genotype?
3:1
FF
Ff
purple flowers
11
Organisms inherit ______ copies of each gene, one from each parent.
1
2
23
46
12
GG
(green peas) x
gg
(yellow). What's the genotypic ratio for the offspring?
0:2:2
3:0
0:4:0
1:2:1
13
The study of inheritance patterns and heredity is called ____________________.
gene therapy
ecology
biology
genetics
14
Gg
(green peas) x
gg
(yellow). What's the genotypic ratio for the offspring?
0:4:0
1:2:1
0:2:2
3:1
15
The physical characteristics or outward appearance of a trait is its __________________.
offspring
genotype
acquired charactistics
phenotype
16
Cross
Tt
x
Tt.
What is the genotypic ratio for the offspring?
2:2:0
1:2:1
3:1
0:4:0
17
Which of the following is another name for a hybrid?
heterozygous
homozygous
Punnett square
purebred
18
Alternative forms of genes are known as ____________________.
traits
alleles
mutations
chromosomes
19
Two alleles that are different versions of a trait are called ___________________ alleles.
homozygous
homologous
heterozygous
purebred
20
Which are dominant, tall pea plants or short pea plants?
there is a wide range of pea plant heights
they are equally dominant
short
tall
