The law of segregation states that ________.

allele pairs separate during gamete formation

Which statement is true of the plant offspring using the Punnett Square below?

100% of the offspring will be tall

What is the best definition of genotype?

set of alleles for a given trait

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Biology: Genetics Basics

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The quiz covers the introductory concepts of #Mendelian #genetics. Including #phenotype and #genotype. Based on #NGSS #HS-LS3-3 and #MS-LS3-2. #Biology #grade9 #grade10 #science

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Questions 12

Answers

1
What is the ratio of offspring when 2 heterozygous plants (Tt) for a certain trait are crossed?
50% TT : 50% tt
100% TT : 0% tt
25% TT : 50% Tt : 25% tt
50% TT : 50% Tt
2
____ of offspring would have the same phenotype as the parents if the cross was Yy by Yy?
50%
100%
25%
75%
3
What is the name of the 1st two individuals that are crossed in a breeding experiment?
F3 generation
F2 generation
F1 generation
P generation
4
What are the parents of the punnett square below?
Tt, Tt,
tt, tt
tt, Tt
TT, tt
5
The law of segregation states that ________.
allele pairs separate during gamete formation
alleles for different traits are distributed independently
only one form of the trait will appear in the offspring
6
What is an allele?
a mutated form a gene
the gene that is expressed
an alternative form a gene
the correct form a gene
7
Which genotype represents a recessive trait?
PP
pp
Pp
8
Recessive traits are always homozygous.
False
True
9
Which statement is true of the plant offspring using the Punnett Square below?
50% of the offspring will be tall.
50% of the offspring will be short
25% of the offspring will be tall.
100% of the offspring will be tall
10
Which statement is true of a plant with genotype TT and another with genotype Tt?
each would have differing phenotypes
all alleles are recessive
all alleles are dominant
both have the same phenotype
11
What is the best definition of genotype?
the physical appearance of an organism
set of alleles for a given trait
12
What are the genotypes for a purebred dominant and purebred recessive plant for a given trait?
All are homozygous recessive
All are homozygous dominant
All are heterozygous
50% homozygous dominant and 50% heterozygous dominant

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