Genetics: X Chromosome Ratio and Dihybrid Cross

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What determines the sex of an individual according to the passage?

The presence or absence of the Y chromosome

The type of inheritance system, such as the ZW system

The ratio of X chromosomes to sets of autosomes (correct)

The number of chromosomes in the individual

In the ZW system for sex determination in birds, what is the genotype of a female bird?

ZZ

WW

ZW (correct)

XX

What is the phenotypic ratio of the F2 generation in a dihybrid cross?

9:3:3:1 (correct)

1:2:1

3:1

1:1

In the bee haploid system, what is the genotype of a fertilized egg (female)?

Diploid (32) Signup and view all the answers

According to Mendelian genetics, what is the genotypic ratio of the F2 generation when the parents are homozygous dominant and homozygous recessive?

1:2:1 Signup and view all the answers

Which of the following is NOT a type of non-Mendelian genetics mentioned in the passage?

Polyploid inheritance Signup and view all the answers

Which genotype represents a heterozygous condition in Mendelian genetics?

Tt Signup and view all the answers

In a dihybrid cross, if the parent organisms are both heterozygous (TtYy), what proportion of the offspring are expected to be homozygous recessive for both traits?

1/16 Signup and view all the answers

What is the significance of a bee's haploid system in terms of sex determination?

Female bees are diploid, while male bees are haploid. Signup and view all the answers

In the ZW system of sex determination in birds, which sex chromosome combination results in a male bird?

ZZ Signup and view all the answers

If an organism has a genotype of 'PpQq', how many different gamete combinations can it produce?

4 Signup and view all the answers

Which statement best describes homozygous individuals in Mendelian genetics?

They carry two identical alleles for a particular gene. Signup and view all the answers

In the ZW sex determination system found in birds, which of the following represents the genotype of a male bird?

ZZ Signup and view all the answers

In a dihybrid cross involving two traits, what is the maximum number of phenotypic classes that can be observed in the F2 generation?

16 Signup and view all the answers

In the haploid system of sex determination in bees, what is the genotype of a male bee?

Haploid (n) Signup and view all the answers

According to Mendel's law of segregation, what is the genotypic ratio of the F2 generation in a monohybrid cross involving a dominant and a recessive allele?

1:2:1 Signup and view all the answers

In Mendelian genetics, what term is used to describe an individual who exhibits a particular phenotype, but does not have the genotype that typically produces that phenotype?

Phenocopy Signup and view all the answers

In a test cross, an individual with a dominant phenotype is crossed with a homozygous recessive individual. What is the expected ratio of phenotypes in the offspring?

1:1 Signup and view all the answers