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Which of the following statements is true for sex-linked traits in birds?
Select one:
a. Females can inherit an allele for a Z-linked trait only from their father, and males can inherit an allele for a Z-linked trait only from their mother.
b. Males can inherit an allele for a Z-linked trait only from their mother, and females can inherit an allele for a Z-linked trait from either their mother or father.
c. Both sexes can inherit an allele for a Z-linked trait from either their mother or father.
d. Females can inherit an allele for a Z-linked trait only from their father, and males can inherit an allele for a Z-linked trait from either their mother or father.

Which of the following statements best describes the events associated with the recombination of genes?
Select one:
a. If two genes are located on the same chromosome, the alleles on non-sister chromatids of homologous chromosomes will segregate together if a crossover does not occur between the two genes.
b. If the alleles in gametes after meiosis are different from those in the parents, the gametes are referred to as recombinant.
c. Crossovers are most likely to occur between linked genes that are close together.
d. Any two genes located on the same chromosome are called linked genes.


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A week ago
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Which of the following statements is true for sex-linked traits in birds? Select one: a. Females can inherit an allele for a Z-linked trait only from their father, and males can inherit an allele for a Z-linked trait only from their mother. b. Males can inherit an allele for a Z-linked trait only from their mother, and females can inherit an allele for a Z-linked trait from either their mother or father. c. Both sexes can inherit an allele for a Z-linked trait from either their mother or father. d. Females can inherit an allele for a Z-linked trait only from their father, and males can inherit an allele for a Z-linked trait from either their mother or father.

d. Female can inherit an allele for a Z linked trait only from their father, and males can inherit an allele for a Z-linked trait from either their mother or father.

Explanation:

In birds, the males are homozygous for Z allele and females are heterozygous as they have one Z-gene and one W allele. So, the possible genotype of male and female are ZZ and ZW respectively. The female can inherit their Z allele only from their father whereas the W is inherited only from a mother. The male can inherit the Z allele from either the mother or the father. So, the correct option is 'd'.

The cross showing the genotype is given below:

Attached

The cross made it clear that the female can only inherit Z from father and male can inherit from either the father or the mother. Hence, the other options are incorrect.

Thus, option D is correct.
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wrote...
Educator
A week ago
Which of the following statements best describes the events associated with the recombination of genes? Select one: a. If two genes are located on the same chromosome, the alleles on non-sister chromatids of homologous chromosomes will segregate together if a crossover does not occur between the two genes. b. If the alleles in gametes after meiosis are different from those in the parents, the gametes are referred to as recombinant. c. Crossovers are most likely to occur between linked genes that are close together. d. Any two genes located on the same chromosome are called linked genes.

https://biology-forums.com/index.php?topic=1922007.msg4959246
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